如何计算带有外部查询的子查询 CASE WHEN 类别？
How do I count subquery CASE WHEN categories with an outer query?
我在这个 db<>fiddle 中有一组示例数据。数据表示根据某些标准属于不同井类型类别的一批井。我正在尝试按井所属的类别对井进行分组，然后根据另一组标准计算每个类别中有多少口井。
我当前的查询部分有效，但只能正确计算 CASE WHEN 子句层次结构中较高的井。这是因为第一个 CASE WHEN 有机会将井类别分配给数据集中的所有井。但是，当它遍历每个 CASE WHEN 子句时，查询“看到的”更少的井，因为它用完了可以为其分配类别的井。当它到达终点时，几乎所有的井都已经分配了一个类别，从而根本不会发生某些类别计数。
这是我当前的查询，也在上面的db<>fiddle link中：
SELECT
dt.WellCategory,
ISNULL(SUM(CASE WHEN dt.LeaseType IN ('F','I','S','P') OR dt.LeaseType NOT IN ('F', 'I', 'S', 'P', 'U') THEN 1 END), 0) AS [Number of Wells], -- Federal + Indian + State + Fee + Multi-Lease
ISNULL(SUM(CASE WHEN dt.LeaseType = 'F' THEN 1 END), 0) AS [Federal], -- Sums up how many wells from the subquery have a leasetype of "Federal"
ISNULL(SUM(CASE WHEN dt.LeaseType = 'I' THEN 1 END), 0) AS [Indian],
ISNULL(SUM(CASE WHEN dt.LeaseType = 'S' THEN 1 END), 0) AS [State],
ISNULL(SUM(CASE WHEN dt.LeaseType = 'P' THEN 1 END), 0) AS [Fee (Private)],
ISNULL(SUM(CASE WHEN dt.LeaseType NOT IN ('F', 'I', 'S', 'P', 'U') THEN 1 END), 0) AS [Multiple Lease Types]
FROM
(
SELECT -- Subquery labels wells according to their wellstatus, welltype, etc.
c.LeaseType,
CASE
WHEN w.WellStatus = 'p' AND w.WellType = 'gw' OR ((w.WellStatus = 'pai' OR w.WellStatus = 'pii') AND (w.WellType = 'gwi' OR w.WellType = 'ggi' OR w.WellType = 'gwd')) THEN 'Producing Gas Wells'
WHEN w.WellStatus = 'p' AND w.WellType = 'ow' OR ((w.WellStatus = 'pai' OR w.WellStatus = 'pii') AND (w.WellType = 'owi' OR w.WellType = 'ogi' OR w.WellType = 'owd')) THEN 'Producing Oil Wells'
WHEN w.WellStatus = 's' AND w.WellType = 'ow' OR ((w.WellStatus = 'sai' OR w.WellStatus = 'sii') AND (w.WellType = 'owi' OR w.WellType = 'ogi' OR w.WellType = 'owd')) THEN 'Shut-In Oil Wells'
WHEN w.WellStatus = 's' AND w.WellType = 'gw' OR ((w.WellStatus = 'sai' OR w.WellStatus = 'sii') AND (w.WellType = 'gwi' or w.WellType = 'ggi' or w.WellType = 'gwd')) THEN 'Shut-In Gas Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'wi' THEN 'Active Water Injection Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'gi' THEN 'Active Gas Injection Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'wd' THEN 'Active Water Disposal Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'gs' THEN 'Active Gas Storage Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'ws' THEN 'Active Water Source Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'tw' THEN 'Active Test Holes'
WHEN w.WellStatus = 'i' AND w.WellType = 'wi' THEN 'Inactive Water Injection Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'gi' THEN 'Inactive Gas Injection Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'wd' THEN 'Inactive Water Disposal Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'gs' THEN 'Inactive Gas Storage Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'ws' THEN 'Inactive Water Source Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'tw' THEN 'Inactive Test Holes'
WHEN w.WellStatus = 'ta' THEN 'Temporarily-Abandoned Wells'
WHEN w.WellStatus = 'pa' THEN 'Plugged and Abandoned Wells'
WHEN c.LateralStatus = 'NEW' THEN 'New Permits - Not Yet Approved'
WHEN c.LateralStatus = 'APD' THEN 'Permits Approved - Not Yet Commenced'
WHEN c.LateralStatus = 'DRL' THEN 'Drilling Commenced - Not Yet Completed'
WHEN c.LateralStatus = 'OPS' THEN 'Drilling Operations Suspended'
WHEN w.WellStatus IN ('drl','ops','p','s','ta','pai','pii','sai','sii','a','i') AND w.Operator = 101600 THEN 'Open Orphan Wells (no known operator)'
WHEN w.WellStatus IN ('drl','ops') THEN 'Total Holes Not Yet Completed'
WHEN ((w.WellStatus = 'p' or w.WellStatus = 's') AND w.WellType <> 'LI') OR (w.WellStatus = 'pai' OR w.WellStatus = 'pii' OR w.WellStatus = 'sai' OR w.WellStatus = 'sii') THEN 'Total Wells Capable of Production'
WHEN (w.WellStatus = 'drl' OR w.WellStatus = 'ops' OR ((w.WellStatus = 'p' or w.WellStatus = 's') AND w.WellType <> 'LI') OR w.WellStatus = 'ta' OR w.WellStatus = 'pai' OR w.WellStatus = 'pii' OR w.WellStatus = 'sai' OR w.WellStatus = 'sii' OR w.WellStatus = 'a' OR w.WellStatus = 'i') THEN 'Total Non-Plugged Wells'
WHEN (w.WellStatus = 'drl' or w.WellStatus = 'ops' or ((w.WellStatus = 'p' or w.WellStatus = 's') and w.WellType <> 'LI') or w.WellStatus = 'ta' or w.WellStatus = 'pai' or w.WellStatus = 'pii' or w.WellStatus = 'sai' or w.WellStatus = 'sii' or w.WellStatus = 'a' or w.WellStatus = 'i' or w.WellStatus = 'pa') THEN 'Total Wells Drilled'
END AS WellCategory
FROM HWell w
LEFT JOIN HConstruct c ON c.WellKey = w.PKey
) dt
GROUP BY dt.WellCategory
ORDER BY dt.WellCategory DESC
这里是 table 上面的查询产生的结果：
Table#1
WellCategory
Number of Wells
Federal
Indian
State
Fee (Private)
Multiple Lease Types
Total Wells Capable of Production
2
2
0
0
0
0
Temporarily-Abandoned Wells
1
1
0
0
0
0
Shut-In Oil Wells
21
10
10
0
1
0
Shut-In Gas Wells
26
19
2
4
1
0
Producing Oil Wells
59
18
25
6
10
0
Producing Gas Wells
90
59
1
25
5
0
Plugged and Abandoned Wells
113
60
15
19
19
0
Permits Approved - Not Yet Commenced
14
4
2
2
4
2
New Permits - Not Yet Approved
1
0
1
0
0
0
Inactive Water Injection Wells
18
11
5
2
0
0
Drilling Operations Suspended
4
1
3
0
0
0
Drilling Commenced - Not Yet Completed
4
1
1
0
2
0
Active Water Injection Wells
6
1
5
0
0
0
Active Water Disposal Wells
1
0
0
1
0
0
NULL
140
83
28
14
15
0
这是 table 我知道可以生成相同的数据集和我想复制的数据集：
Table#2
Well Statuses
Number Of Wells
Federal
Indian
State
Fee (Private)
Multiple Lease Types
Producing Oil Wells
59
18
25
6
10
0
Producing Gas Wells
90
59
1
25
5
0
Shut-In Oil Wells
21
10
10
0
1
0
Shut-In Gas Wells
26
19
2
4
1
0
Active Water Injection Wells
6
1
5
0
0
0
Active Gas Injection Wells
0
0
0
0
0
0
Active Water Disposal Wells
1
0
0
1
0
0
Active Gas Storage Wells
0
0
0
0
0
0
Active Water Source Wells
0
0
0
0
0
0
Active Test Holes
0
0
0
0
0
0
Inactive Water Injection Wells
18
11
5
2
0
0
Inactive Gas Injection Wells
0
0
0
0
0
0
Inactive Water Disposal Wells
0
0
0
0
0
0
Inactive Gas Storage Wells
0
0
0
0
0
0
Inactive Water Source Wells
0
0
0
0
0
0
Inactive Test Holes
0
0
0
0
0
0
Temporarily-Abandoned Wells
1
1
0
0
0
0
Plugged and Abandoned Wells
113
60
15
19
19
0
New Permits - Not Yet Approved
1
0
1
0
0
0
Permits Approved - Not Yet Commenced
14
4
2
2
4
2
Drilling Commenced - Not Yet Completed
4
1
1
0
2
0
Drilling Operations Suspended
4
1
3
0
0
0
Open Orphan Wells (no known operator)
1
1
0
0
0
0
Total Holes Not Yet Completed
8
2
4
0
2
0
Total Wells Capable of Production
198
108
38
35
17
0
Total Non-Plugged Wells
232
123
52
38
19
0
Total Wells Drilled
345
183
67
57
38
0
Table #2 是使用更长的查询生成的，该查询使用多个子查询和临时 tables 来计算每个类别中有多少口井属于 DISTINCT w.WellID。此外，完整的数据集有更多的条目，通常每个类别中至少有一些井而不是那么多“0”。
我不知道如何告诉查询多次计算井的数量，如果它们属于几个井类别而不使查询超长并开始引入临时 tables，我不希望这样做去做。 *注意我不想为同一类别计算两次，每个类别只计算一次。
您可以执行此操作的一种方法是为每个条件生成一行，然后汇总那些 return 匹配项，这可以使用 cross apply 和 values table 生成器确保所有 case 表达式都针对所有孔进行评估。
目前这种方法假设每个孔只有一个WellCategory值。如果可以有多个，那么您将需要自己进行这些更改。我也没有将输出包装在 pivot 中，因为我认为这通常最好在您的表示层中完成，而不是原始的 SQL.
我建议将 SQL 输出保留为这种格式，因为演示工具在动态处理新类别（例如添加了新的 LeaseType）方面比 SQL 更好，后者在这种规范化格式中不需要更改脚本或表示层，除非有任何定制标签。
如果您想保留旋转输出，只需将此查询包装在当前的外部 select:
查询
select c.LeaseType
,cat.WellCategory
,count(w.PKey) as Wells
from @HWell as w
left join @HConstruct as c
on w.Pkey = c.WellKey
cross apply(values(case when w.WellStatus = 'p' AND w.WellType = 'gw' OR ((w.WellStatus = 'pai' OR w.WellStatus = 'pii') AND (w.WellType = 'gwi' OR w.WellType = 'ggi' OR w.WellType = 'gwd')) then 'Producing Gas Wells' end)
,(case when w.WellStatus = 'p' AND w.WellType = 'ow' OR ((w.WellStatus = 'pai' OR w.WellStatus = 'pii') AND (w.WellType = 'owi' OR w.WellType = 'ogi' OR w.WellType = 'owd')) then 'Producing Oil Wells' end) -- Need to count DISTINCT WellID's to get to 4770
,(case when w.WellStatus = 's' AND w.WellType = 'ow' OR ((w.WellStatus = 'sai' OR w.WellStatus = 'sii') AND (w.WellType = 'owi' OR w.WellType = 'ogi' OR w.WellType = 'owd')) then 'Shut-In Oil Wells' end)
,(case when w.WellStatus = 's' AND w.WellType = 'gw' OR ((w.WellStatus = 'sai' OR w.WellStatus = 'sii') AND (w.WellType = 'gwi' or w.WellType = 'ggi' or w.WellType = 'gwd')) then 'Shut-In Gas Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'wi' then 'Active Water Injection Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'gi' then 'Active Gas Injection Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'wd' then 'Active Water Disposal Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'gs' then 'Active Gas Storage Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'ws' then 'Active Water Source Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'tw' then 'Active Test Holes' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'wi' then 'Inactive Water Injection Wells' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'gi' then 'Inactive Gas Injection Wells' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'wd' then 'Inactive Water Disposal Wells' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'gs' then 'Inactive Gas Storage Wells' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'ws' then 'Inactive Water Source Wells' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'tw' then 'Inactive Test Holes' end)
,(case when w.WellStatus = 'ta' then 'Temporarily-Abandoned Wells' end)
,(case when w.WellStatus = 'pa' then 'Plugged and Abandoned Wells' end)
,(case when c.LateralStatus = 'NEW' then 'New Permits - Not Yet Approved' end)
,(case when c.LateralStatus = 'APD' then 'Permits Approved - Not Yet Commenced' end)
,(case when c.LateralStatus = 'DRL' then 'Drilling Commenced - Not Yet Completed' end)
,(case when c.LateralStatus = 'OPS' then 'Drilling Operations Suspended' end)
,(case when w.WellStatus IN ('drl','ops','p','s','ta','pai','pii','sai','sii','a','i') AND w.Operator = 101600 then 'Open Orphan Wells (no known operator)' end)
,(case when w.WellStatus IN ('drl','ops') then 'Total Holes Not Yet Completed' end)
,(case when ((w.WellStatus = 'p' or w.WellStatus = 's') AND w.WellType <> 'LI') OR (w.WellStatus = 'pai' OR w.WellStatus = 'pii' OR w.WellStatus = 'sai' OR w.WellStatus = 'sii') then 'Total Wells Capable of Production' end)
,(case when (w.WellStatus = 'drl' OR w.WellStatus = 'ops' OR ((w.WellStatus = 'p' or w.WellStatus = 's') AND w.WellType <> 'LI') OR w.WellStatus = 'ta' OR w.WellStatus = 'pai' OR w.WellStatus = 'pii' OR w.WellStatus = 'sai' OR w.WellStatus = 'sii' OR w.WellStatus = 'a' OR w.WellStatus = 'i') then 'Total Non-Plugged Wells' end)
,(case when (w.WellStatus = 'drl' or w.WellStatus = 'ops' or ((w.WellStatus = 'p' or w.WellStatus = 's') and w.WellType <> 'LI') or w.WellStatus = 'ta' or w.WellStatus = 'pai' or w.WellStatus = 'pii' or w.WellStatus = 'sai' or w.WellStatus = 'sii' or w.WellStatus = 'a' or w.WellStatus = 'i' or w.WellStatus = 'pa') then 'Total Wells Drilled' end)
) as cat(WellCategory)
where cat.WellCategory is not null
group by c.LeaseType
,cat.WellCategory
order by c.LeaseType
,Wells desc;
输出
LeaseType
WellCategory
Wells
F
Total Wells Drilled
183
F
Total Non-Plugged Wells
123
F
Total Wells Capable of Production
108
F
Plugged and Abandoned Wells
60
F
Producing Gas Wells
59
F
Shut-In Gas Wells
19
F
Producing Oil Wells
18
F
Inactive Water Injection Wells
11
F
Shut-In Oil Wells
10
F
Permits Approved - Not Yet Commenced
4
F
Total Holes Not Yet Completed
2
F
Drilling Commenced - Not Yet Completed
1
F
Open Orphan Wells (no known operator)
1
F
Temporarily-Abandoned Wells
1
F
Active Water Injection Wells
1
F
Drilling Operations Suspended
1
I
Total Wells Drilled
67
I
Total Non-Plugged Wells
52
I
Total Wells Capable of Production
38
I
Producing Oil Wells
25
I
Plugged and Abandoned Wells
15
I
Shut-In Oil Wells
10
I
Active Water Injection Wells
5
I
Inactive Water Injection Wells
5
I
Total Holes Not Yet Completed
4
I
Drilling Operations Suspended
3
I
Permits Approved - Not Yet Commenced
2
I
Shut-In Gas Wells
2
I
New Permits - Not Yet Approved
1
I
Producing Gas Wells
1
I
Drilling Commenced - Not Yet Completed
1
IP
Permits Approved - Not Yet Commenced
2
P
Total Wells Drilled
38
P
Total Non-Plugged Wells
19
P
Plugged and Abandoned Wells
19
P
Total Wells Capable of Production
17
P
Producing Oil Wells
10
P
Producing Gas Wells
5
P
Permits Approved - Not Yet Commenced
4
P
Total Holes Not Yet Completed
2
P
Drilling Commenced - Not Yet Completed
2
P
Shut-In Gas Wells
1
P
Shut-In Oil Wells
1
S
Total Wells Drilled
57
S
Total Non-Plugged Wells
38
S
Total Wells Capable of Production
35
S
Producing Gas Wells
25
S
Plugged and Abandoned Wells
19
S
Producing Oil Wells
6
S
Shut-In Gas Wells
4
S
Permits Approved - Not Yet Commenced
2
S
Inactive Water Injection Wells
2
S
Active Water Disposal Wells
1
这里有一种方法可以做到这一点，同时又能使它易于阅读：
我将 CASE 语句分解为符合逻辑的片段。不重叠但看起来相关的部分进入它们自己的查询以确定类别。然后我UNION ALL将它们放在一起以避免重复数据删除。
有很多方法可以做到这一点，这只是其中之一...
此外，就像我在聊天会话中提到的那样，如果可以的话，我强烈建议您对这些数据进行规范化、创建查找 tables 等。
WITH cte_Wells AS (
SELECT w.WellStatus, w.WellType, c.LateralStatus, c.LeaseType, w.Operator
FROM dbo.HWell w
LEFT JOIN dbo.HConstruct c ON c.WellKey = w.PKey
)
SELECT
dt.WellCategory,
ISNULL(SUM(CASE WHEN dt.LeaseType IN ('F','I','S','P') OR dt.LeaseType NOT IN ('F', 'I', 'S', 'P', 'U') THEN 1 END), 0) AS [Number of Wells], -- Federal + Indian + State + Fee + Multi-Lease
ISNULL(SUM(CASE WHEN dt.LeaseType = 'F' THEN 1 END), 0) AS [Federal], -- Sums up how many wells from the subquery have a leasetype of "Federal"
ISNULL(SUM(CASE WHEN dt.LeaseType = 'I' THEN 1 END), 0) AS [Indian],
ISNULL(SUM(CASE WHEN dt.LeaseType = 'S' THEN 1 END), 0) AS [State],
ISNULL(SUM(CASE WHEN dt.LeaseType = 'P' THEN 1 END), 0) AS [Fee (Private)],
ISNULL(SUM(CASE WHEN dt.LeaseType NOT IN ('F', 'I', 'S', 'P', 'U') THEN 1 END), 0) AS [Multiple Lease Types]
FROM (
SELECT w.LeaseType, x.WellCategory
FROM cte_Wells w
CROSS APPLY (
SELECT WellCategory = CASE
WHEN w.WellStatus = 'p' AND w.WellType = 'gw' OR (w.WellStatus IN ('pai','pii') AND w.WellType IN ('gwi','ggi','gwd')) THEN 'Producing Gas Wells'
WHEN w.WellStatus = 'p' AND w.WellType = 'ow' OR (w.WellStatus IN ('pai','pii') AND w.WellType IN ('owi','ogi','owd')) THEN 'Producing Oil Wells'
WHEN w.WellStatus = 's' AND w.WellType = 'gw' OR (w.WellStatus IN ('sai','sii') AND w.WellType IN ('gwi','ggi','gwd')) THEN 'Shut-In Gas Wells'
WHEN w.WellStatus = 's' AND w.WellType = 'ow' OR (w.WellStatus IN ('sai','sii') AND w.WellType IN ('owi','ogi','owd')) THEN 'Shut-In Oil Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'wi' THEN 'Active Water Injection Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'gi' THEN 'Active Gas Injection Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'wd' THEN 'Active Water Disposal Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'gs' THEN 'Active Gas Storage Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'ws' THEN 'Active Water Source Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'tw' THEN 'Active Test Holes'
WHEN w.WellStatus = 'i' AND w.WellType = 'wi' THEN 'Inactive Water Injection Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'gi' THEN 'Inactive Gas Injection Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'wd' THEN 'Inactive Water Disposal Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'gs' THEN 'Inactive Gas Storage Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'ws' THEN 'Inactive Water Source Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'tw' THEN 'Inactive Test Holes'
WHEN w.WellStatus = 'ta' THEN 'Temporarily-Abandoned Wells'
WHEN w.WellStatus = 'pa' THEN 'Plugged and Abandoned Wells'
ELSE NULL
END
) x
WHERE x.WellCategory IS NOT NULL
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, x.WellCategory
FROM cte_Wells w
CROSS APPLY (
SELECT WellCategory = CASE
WHEN w.LateralStatus = 'NEW' THEN 'New Permits - Not Yet Approved'
WHEN w.LateralStatus = 'APD' THEN 'Permits Approved - Not Yet Commenced'
WHEN w.LateralStatus = 'DRL' THEN 'Drilling Commenced - Not Yet Completed'
WHEN w.LateralStatus = 'OPS' THEN 'Drilling Operations Suspended'
ELSE NULL
END
) x
WHERE x.WellCategory IS NOT NULL
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, WellCategory = 'Open Orphan Wells (no known operator)'
FROM cte_Wells w
WHERE w.WellStatus IN ('drl','ops','p','s','ta','pai','pii','sai','sii','a','i') AND w.Operator = 101600
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, WellCategory = 'Total Holes Not Yet Completed'
FROM cte_Wells w
WHERE w.WellStatus IN ('drl','ops')
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, WellCategory = 'Total Wells Capable of Production'
FROM cte_Wells w
WHERE (w.WellStatus IN ('p','s') AND w.WellType <> 'LI') OR w.WellStatus IN ('pai','pii','sai','sii')
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, WellCategory = 'Total Non-Plugged Wells'
FROM cte_Wells w
WHERE (w.WellStatus IN ('p','s') AND w.WellType <> 'LI') OR w.WellStatus IN ('drl','ops','ta','pai','pii','sai','sii','a','i')
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, WellCategory = 'Total Wells Drilled'
FROM cte_Wells w
WHERE (w.WellStatus IN ('p','s') AND w.WellType <> 'LI') or w.WellStatus IN ('drl','ops','ta','pai','pii','sai','sii','a','i','pa')
) dt
GROUP BY dt.WellCategory
ORDER BY dt.WellCategory DESC
我已经根据您的示例数据和建议的预期结果检查了此查询的结果，它们似乎匹配。所以这会让你得到你想要的。但是，由于我不知道数据，您需要检查它是否存在逻辑错误和性能。
注意：此查询的结果不会生成空类别的计数。如果那是您需要的东西，请对此解决方案发表评论，我可以解决它。解决方法是添加一个包含所有类别的 table，然后 LEFT JOIN 到计数结果。
我在这个 db<>fiddle 中有一组示例数据。数据表示根据某些标准属于不同井类型类别的一批井。我正在尝试按井所属的类别对井进行分组，然后根据另一组标准计算每个类别中有多少口井。
我当前的查询部分有效，但只能正确计算 CASE WHEN 子句层次结构中较高的井。这是因为第一个 CASE WHEN 有机会将井类别分配给数据集中的所有井。但是，当它遍历每个 CASE WHEN 子句时，查询“看到的”更少的井，因为它用完了可以为其分配类别的井。当它到达终点时，几乎所有的井都已经分配了一个类别，从而根本不会发生某些类别计数。
这是我当前的查询，也在上面的db<>fiddle link中：
SELECT
dt.WellCategory,
ISNULL(SUM(CASE WHEN dt.LeaseType IN ('F','I','S','P') OR dt.LeaseType NOT IN ('F', 'I', 'S', 'P', 'U') THEN 1 END), 0) AS [Number of Wells], -- Federal + Indian + State + Fee + Multi-Lease
ISNULL(SUM(CASE WHEN dt.LeaseType = 'F' THEN 1 END), 0) AS [Federal], -- Sums up how many wells from the subquery have a leasetype of "Federal"
ISNULL(SUM(CASE WHEN dt.LeaseType = 'I' THEN 1 END), 0) AS [Indian],
ISNULL(SUM(CASE WHEN dt.LeaseType = 'S' THEN 1 END), 0) AS [State],
ISNULL(SUM(CASE WHEN dt.LeaseType = 'P' THEN 1 END), 0) AS [Fee (Private)],
ISNULL(SUM(CASE WHEN dt.LeaseType NOT IN ('F', 'I', 'S', 'P', 'U') THEN 1 END), 0) AS [Multiple Lease Types]
FROM
(
SELECT -- Subquery labels wells according to their wellstatus, welltype, etc.
c.LeaseType,
CASE
WHEN w.WellStatus = 'p' AND w.WellType = 'gw' OR ((w.WellStatus = 'pai' OR w.WellStatus = 'pii') AND (w.WellType = 'gwi' OR w.WellType = 'ggi' OR w.WellType = 'gwd')) THEN 'Producing Gas Wells'
WHEN w.WellStatus = 'p' AND w.WellType = 'ow' OR ((w.WellStatus = 'pai' OR w.WellStatus = 'pii') AND (w.WellType = 'owi' OR w.WellType = 'ogi' OR w.WellType = 'owd')) THEN 'Producing Oil Wells'
WHEN w.WellStatus = 's' AND w.WellType = 'ow' OR ((w.WellStatus = 'sai' OR w.WellStatus = 'sii') AND (w.WellType = 'owi' OR w.WellType = 'ogi' OR w.WellType = 'owd')) THEN 'Shut-In Oil Wells'
WHEN w.WellStatus = 's' AND w.WellType = 'gw' OR ((w.WellStatus = 'sai' OR w.WellStatus = 'sii') AND (w.WellType = 'gwi' or w.WellType = 'ggi' or w.WellType = 'gwd')) THEN 'Shut-In Gas Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'wi' THEN 'Active Water Injection Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'gi' THEN 'Active Gas Injection Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'wd' THEN 'Active Water Disposal Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'gs' THEN 'Active Gas Storage Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'ws' THEN 'Active Water Source Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'tw' THEN 'Active Test Holes'
WHEN w.WellStatus = 'i' AND w.WellType = 'wi' THEN 'Inactive Water Injection Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'gi' THEN 'Inactive Gas Injection Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'wd' THEN 'Inactive Water Disposal Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'gs' THEN 'Inactive Gas Storage Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'ws' THEN 'Inactive Water Source Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'tw' THEN 'Inactive Test Holes'
WHEN w.WellStatus = 'ta' THEN 'Temporarily-Abandoned Wells'
WHEN w.WellStatus = 'pa' THEN 'Plugged and Abandoned Wells'
WHEN c.LateralStatus = 'NEW' THEN 'New Permits - Not Yet Approved'
WHEN c.LateralStatus = 'APD' THEN 'Permits Approved - Not Yet Commenced'
WHEN c.LateralStatus = 'DRL' THEN 'Drilling Commenced - Not Yet Completed'
WHEN c.LateralStatus = 'OPS' THEN 'Drilling Operations Suspended'
WHEN w.WellStatus IN ('drl','ops','p','s','ta','pai','pii','sai','sii','a','i') AND w.Operator = 101600 THEN 'Open Orphan Wells (no known operator)'
WHEN w.WellStatus IN ('drl','ops') THEN 'Total Holes Not Yet Completed'
WHEN ((w.WellStatus = 'p' or w.WellStatus = 's') AND w.WellType <> 'LI') OR (w.WellStatus = 'pai' OR w.WellStatus = 'pii' OR w.WellStatus = 'sai' OR w.WellStatus = 'sii') THEN 'Total Wells Capable of Production'
WHEN (w.WellStatus = 'drl' OR w.WellStatus = 'ops' OR ((w.WellStatus = 'p' or w.WellStatus = 's') AND w.WellType <> 'LI') OR w.WellStatus = 'ta' OR w.WellStatus = 'pai' OR w.WellStatus = 'pii' OR w.WellStatus = 'sai' OR w.WellStatus = 'sii' OR w.WellStatus = 'a' OR w.WellStatus = 'i') THEN 'Total Non-Plugged Wells'
WHEN (w.WellStatus = 'drl' or w.WellStatus = 'ops' or ((w.WellStatus = 'p' or w.WellStatus = 's') and w.WellType <> 'LI') or w.WellStatus = 'ta' or w.WellStatus = 'pai' or w.WellStatus = 'pii' or w.WellStatus = 'sai' or w.WellStatus = 'sii' or w.WellStatus = 'a' or w.WellStatus = 'i' or w.WellStatus = 'pa') THEN 'Total Wells Drilled'
END AS WellCategory
FROM HWell w
LEFT JOIN HConstruct c ON c.WellKey = w.PKey
) dt
GROUP BY dt.WellCategory
ORDER BY dt.WellCategory DESC
这里是 table 上面的查询产生的结果：
Table#1
| WellCategory | Number of Wells | Federal | Indian | State | Fee (Private) | Multiple Lease Types |
|---|---|---|---|---|---|---|
| Total Wells Capable of Production | 2 | 2 | 0 | 0 | 0 | 0 |
| Temporarily-Abandoned Wells | 1 | 1 | 0 | 0 | 0 | 0 |
| Shut-In Oil Wells | 21 | 10 | 10 | 0 | 1 | 0 |
| Shut-In Gas Wells | 26 | 19 | 2 | 4 | 1 | 0 |
| Producing Oil Wells | 59 | 18 | 25 | 6 | 10 | 0 |
| Producing Gas Wells | 90 | 59 | 1 | 25 | 5 | 0 |
| Plugged and Abandoned Wells | 113 | 60 | 15 | 19 | 19 | 0 |
| Permits Approved - Not Yet Commenced | 14 | 4 | 2 | 2 | 4 | 2 |
| New Permits - Not Yet Approved | 1 | 0 | 1 | 0 | 0 | 0 |
| Inactive Water Injection Wells | 18 | 11 | 5 | 2 | 0 | 0 |
| Drilling Operations Suspended | 4 | 1 | 3 | 0 | 0 | 0 |
| Drilling Commenced - Not Yet Completed | 4 | 1 | 1 | 0 | 2 | 0 |
| Active Water Injection Wells | 6 | 1 | 5 | 0 | 0 | 0 |
| Active Water Disposal Wells | 1 | 0 | 0 | 1 | 0 | 0 |
| NULL | 140 | 83 | 28 | 14 | 15 | 0 |
这是 table 我知道可以生成相同的数据集和我想复制的数据集：
Table#2
| Well Statuses | Number Of Wells | Federal | Indian | State | Fee (Private) | Multiple Lease Types |
|---|---|---|---|---|---|---|
| Producing Oil Wells | 59 | 18 | 25 | 6 | 10 | 0 |
| Producing Gas Wells | 90 | 59 | 1 | 25 | 5 | 0 |
| Shut-In Oil Wells | 21 | 10 | 10 | 0 | 1 | 0 |
| Shut-In Gas Wells | 26 | 19 | 2 | 4 | 1 | 0 |
| Active Water Injection Wells | 6 | 1 | 5 | 0 | 0 | 0 |
| Active Gas Injection Wells | 0 | 0 | 0 | 0 | 0 | 0 |
| Active Water Disposal Wells | 1 | 0 | 0 | 1 | 0 | 0 |
| Active Gas Storage Wells | 0 | 0 | 0 | 0 | 0 | 0 |
| Active Water Source Wells | 0 | 0 | 0 | 0 | 0 | 0 |
| Active Test Holes | 0 | 0 | 0 | 0 | 0 | 0 |
| Inactive Water Injection Wells | 18 | 11 | 5 | 2 | 0 | 0 |
| Inactive Gas Injection Wells | 0 | 0 | 0 | 0 | 0 | 0 |
| Inactive Water Disposal Wells | 0 | 0 | 0 | 0 | 0 | 0 |
| Inactive Gas Storage Wells | 0 | 0 | 0 | 0 | 0 | 0 |
| Inactive Water Source Wells | 0 | 0 | 0 | 0 | 0 | 0 |
| Inactive Test Holes | 0 | 0 | 0 | 0 | 0 | 0 |
| Temporarily-Abandoned Wells | 1 | 1 | 0 | 0 | 0 | 0 |
| Plugged and Abandoned Wells | 113 | 60 | 15 | 19 | 19 | 0 |
| New Permits - Not Yet Approved | 1 | 0 | 1 | 0 | 0 | 0 |
| Permits Approved - Not Yet Commenced | 14 | 4 | 2 | 2 | 4 | 2 |
| Drilling Commenced - Not Yet Completed | 4 | 1 | 1 | 0 | 2 | 0 |
| Drilling Operations Suspended | 4 | 1 | 3 | 0 | 0 | 0 |
| Open Orphan Wells (no known operator) | 1 | 1 | 0 | 0 | 0 | 0 |
| Total Holes Not Yet Completed | 8 | 2 | 4 | 0 | 2 | 0 |
| Total Wells Capable of Production | 198 | 108 | 38 | 35 | 17 | 0 |
| Total Non-Plugged Wells | 232 | 123 | 52 | 38 | 19 | 0 |
| Total Wells Drilled | 345 | 183 | 67 | 57 | 38 | 0 |
Table #2 是使用更长的查询生成的，该查询使用多个子查询和临时 tables 来计算每个类别中有多少口井属于 DISTINCT w.WellID。此外，完整的数据集有更多的条目，通常每个类别中至少有一些井而不是那么多“0”。
我不知道如何告诉查询多次计算井的数量，如果它们属于几个井类别而不使查询超长并开始引入临时 tables，我不希望这样做去做。 *注意我不想为同一类别计算两次，每个类别只计算一次。
您可以执行此操作的一种方法是为每个条件生成一行，然后汇总那些 return 匹配项，这可以使用 cross apply 和 values table 生成器确保所有 case 表达式都针对所有孔进行评估。
目前这种方法假设每个孔只有一个WellCategory值。如果可以有多个，那么您将需要自己进行这些更改。我也没有将输出包装在 pivot 中，因为我认为这通常最好在您的表示层中完成，而不是原始的 SQL.
我建议将 SQL 输出保留为这种格式，因为演示工具在动态处理新类别（例如添加了新的 LeaseType）方面比 SQL 更好，后者在这种规范化格式中不需要更改脚本或表示层，除非有任何定制标签。
如果您想保留旋转输出，只需将此查询包装在当前的外部 select:
查询
select c.LeaseType
,cat.WellCategory
,count(w.PKey) as Wells
from @HWell as w
left join @HConstruct as c
on w.Pkey = c.WellKey
cross apply(values(case when w.WellStatus = 'p' AND w.WellType = 'gw' OR ((w.WellStatus = 'pai' OR w.WellStatus = 'pii') AND (w.WellType = 'gwi' OR w.WellType = 'ggi' OR w.WellType = 'gwd')) then 'Producing Gas Wells' end)
,(case when w.WellStatus = 'p' AND w.WellType = 'ow' OR ((w.WellStatus = 'pai' OR w.WellStatus = 'pii') AND (w.WellType = 'owi' OR w.WellType = 'ogi' OR w.WellType = 'owd')) then 'Producing Oil Wells' end) -- Need to count DISTINCT WellID's to get to 4770
,(case when w.WellStatus = 's' AND w.WellType = 'ow' OR ((w.WellStatus = 'sai' OR w.WellStatus = 'sii') AND (w.WellType = 'owi' OR w.WellType = 'ogi' OR w.WellType = 'owd')) then 'Shut-In Oil Wells' end)
,(case when w.WellStatus = 's' AND w.WellType = 'gw' OR ((w.WellStatus = 'sai' OR w.WellStatus = 'sii') AND (w.WellType = 'gwi' or w.WellType = 'ggi' or w.WellType = 'gwd')) then 'Shut-In Gas Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'wi' then 'Active Water Injection Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'gi' then 'Active Gas Injection Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'wd' then 'Active Water Disposal Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'gs' then 'Active Gas Storage Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'ws' then 'Active Water Source Wells' end)
,(case when w.WellStatus = 'a' AND w.WellType = 'tw' then 'Active Test Holes' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'wi' then 'Inactive Water Injection Wells' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'gi' then 'Inactive Gas Injection Wells' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'wd' then 'Inactive Water Disposal Wells' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'gs' then 'Inactive Gas Storage Wells' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'ws' then 'Inactive Water Source Wells' end)
,(case when w.WellStatus = 'i' AND w.WellType = 'tw' then 'Inactive Test Holes' end)
,(case when w.WellStatus = 'ta' then 'Temporarily-Abandoned Wells' end)
,(case when w.WellStatus = 'pa' then 'Plugged and Abandoned Wells' end)
,(case when c.LateralStatus = 'NEW' then 'New Permits - Not Yet Approved' end)
,(case when c.LateralStatus = 'APD' then 'Permits Approved - Not Yet Commenced' end)
,(case when c.LateralStatus = 'DRL' then 'Drilling Commenced - Not Yet Completed' end)
,(case when c.LateralStatus = 'OPS' then 'Drilling Operations Suspended' end)
,(case when w.WellStatus IN ('drl','ops','p','s','ta','pai','pii','sai','sii','a','i') AND w.Operator = 101600 then 'Open Orphan Wells (no known operator)' end)
,(case when w.WellStatus IN ('drl','ops') then 'Total Holes Not Yet Completed' end)
,(case when ((w.WellStatus = 'p' or w.WellStatus = 's') AND w.WellType <> 'LI') OR (w.WellStatus = 'pai' OR w.WellStatus = 'pii' OR w.WellStatus = 'sai' OR w.WellStatus = 'sii') then 'Total Wells Capable of Production' end)
,(case when (w.WellStatus = 'drl' OR w.WellStatus = 'ops' OR ((w.WellStatus = 'p' or w.WellStatus = 's') AND w.WellType <> 'LI') OR w.WellStatus = 'ta' OR w.WellStatus = 'pai' OR w.WellStatus = 'pii' OR w.WellStatus = 'sai' OR w.WellStatus = 'sii' OR w.WellStatus = 'a' OR w.WellStatus = 'i') then 'Total Non-Plugged Wells' end)
,(case when (w.WellStatus = 'drl' or w.WellStatus = 'ops' or ((w.WellStatus = 'p' or w.WellStatus = 's') and w.WellType <> 'LI') or w.WellStatus = 'ta' or w.WellStatus = 'pai' or w.WellStatus = 'pii' or w.WellStatus = 'sai' or w.WellStatus = 'sii' or w.WellStatus = 'a' or w.WellStatus = 'i' or w.WellStatus = 'pa') then 'Total Wells Drilled' end)
) as cat(WellCategory)
where cat.WellCategory is not null
group by c.LeaseType
,cat.WellCategory
order by c.LeaseType
,Wells desc;
输出
| LeaseType | WellCategory | Wells |
|---|---|---|
| F | Total Wells Drilled | 183 |
| F | Total Non-Plugged Wells | 123 |
| F | Total Wells Capable of Production | 108 |
| F | Plugged and Abandoned Wells | 60 |
| F | Producing Gas Wells | 59 |
| F | Shut-In Gas Wells | 19 |
| F | Producing Oil Wells | 18 |
| F | Inactive Water Injection Wells | 11 |
| F | Shut-In Oil Wells | 10 |
| F | Permits Approved - Not Yet Commenced | 4 |
| F | Total Holes Not Yet Completed | 2 |
| F | Drilling Commenced - Not Yet Completed | 1 |
| F | Open Orphan Wells (no known operator) | 1 |
| F | Temporarily-Abandoned Wells | 1 |
| F | Active Water Injection Wells | 1 |
| F | Drilling Operations Suspended | 1 |
| I | Total Wells Drilled | 67 |
| I | Total Non-Plugged Wells | 52 |
| I | Total Wells Capable of Production | 38 |
| I | Producing Oil Wells | 25 |
| I | Plugged and Abandoned Wells | 15 |
| I | Shut-In Oil Wells | 10 |
| I | Active Water Injection Wells | 5 |
| I | Inactive Water Injection Wells | 5 |
| I | Total Holes Not Yet Completed | 4 |
| I | Drilling Operations Suspended | 3 |
| I | Permits Approved - Not Yet Commenced | 2 |
| I | Shut-In Gas Wells | 2 |
| I | New Permits - Not Yet Approved | 1 |
| I | Producing Gas Wells | 1 |
| I | Drilling Commenced - Not Yet Completed | 1 |
| IP | Permits Approved - Not Yet Commenced | 2 |
| P | Total Wells Drilled | 38 |
| P | Total Non-Plugged Wells | 19 |
| P | Plugged and Abandoned Wells | 19 |
| P | Total Wells Capable of Production | 17 |
| P | Producing Oil Wells | 10 |
| P | Producing Gas Wells | 5 |
| P | Permits Approved - Not Yet Commenced | 4 |
| P | Total Holes Not Yet Completed | 2 |
| P | Drilling Commenced - Not Yet Completed | 2 |
| P | Shut-In Gas Wells | 1 |
| P | Shut-In Oil Wells | 1 |
| S | Total Wells Drilled | 57 |
| S | Total Non-Plugged Wells | 38 |
| S | Total Wells Capable of Production | 35 |
| S | Producing Gas Wells | 25 |
| S | Plugged and Abandoned Wells | 19 |
| S | Producing Oil Wells | 6 |
| S | Shut-In Gas Wells | 4 |
| S | Permits Approved - Not Yet Commenced | 2 |
| S | Inactive Water Injection Wells | 2 |
| S | Active Water Disposal Wells | 1 |
这里有一种方法可以做到这一点，同时又能使它易于阅读：
我将 CASE 语句分解为符合逻辑的片段。不重叠但看起来相关的部分进入它们自己的查询以确定类别。然后我UNION ALL将它们放在一起以避免重复数据删除。
有很多方法可以做到这一点，这只是其中之一...
此外，就像我在聊天会话中提到的那样，如果可以的话，我强烈建议您对这些数据进行规范化、创建查找 tables 等。
WITH cte_Wells AS (
SELECT w.WellStatus, w.WellType, c.LateralStatus, c.LeaseType, w.Operator
FROM dbo.HWell w
LEFT JOIN dbo.HConstruct c ON c.WellKey = w.PKey
)
SELECT
dt.WellCategory,
ISNULL(SUM(CASE WHEN dt.LeaseType IN ('F','I','S','P') OR dt.LeaseType NOT IN ('F', 'I', 'S', 'P', 'U') THEN 1 END), 0) AS [Number of Wells], -- Federal + Indian + State + Fee + Multi-Lease
ISNULL(SUM(CASE WHEN dt.LeaseType = 'F' THEN 1 END), 0) AS [Federal], -- Sums up how many wells from the subquery have a leasetype of "Federal"
ISNULL(SUM(CASE WHEN dt.LeaseType = 'I' THEN 1 END), 0) AS [Indian],
ISNULL(SUM(CASE WHEN dt.LeaseType = 'S' THEN 1 END), 0) AS [State],
ISNULL(SUM(CASE WHEN dt.LeaseType = 'P' THEN 1 END), 0) AS [Fee (Private)],
ISNULL(SUM(CASE WHEN dt.LeaseType NOT IN ('F', 'I', 'S', 'P', 'U') THEN 1 END), 0) AS [Multiple Lease Types]
FROM (
SELECT w.LeaseType, x.WellCategory
FROM cte_Wells w
CROSS APPLY (
SELECT WellCategory = CASE
WHEN w.WellStatus = 'p' AND w.WellType = 'gw' OR (w.WellStatus IN ('pai','pii') AND w.WellType IN ('gwi','ggi','gwd')) THEN 'Producing Gas Wells'
WHEN w.WellStatus = 'p' AND w.WellType = 'ow' OR (w.WellStatus IN ('pai','pii') AND w.WellType IN ('owi','ogi','owd')) THEN 'Producing Oil Wells'
WHEN w.WellStatus = 's' AND w.WellType = 'gw' OR (w.WellStatus IN ('sai','sii') AND w.WellType IN ('gwi','ggi','gwd')) THEN 'Shut-In Gas Wells'
WHEN w.WellStatus = 's' AND w.WellType = 'ow' OR (w.WellStatus IN ('sai','sii') AND w.WellType IN ('owi','ogi','owd')) THEN 'Shut-In Oil Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'wi' THEN 'Active Water Injection Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'gi' THEN 'Active Gas Injection Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'wd' THEN 'Active Water Disposal Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'gs' THEN 'Active Gas Storage Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'ws' THEN 'Active Water Source Wells'
WHEN w.WellStatus = 'a' AND w.WellType = 'tw' THEN 'Active Test Holes'
WHEN w.WellStatus = 'i' AND w.WellType = 'wi' THEN 'Inactive Water Injection Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'gi' THEN 'Inactive Gas Injection Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'wd' THEN 'Inactive Water Disposal Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'gs' THEN 'Inactive Gas Storage Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'ws' THEN 'Inactive Water Source Wells'
WHEN w.WellStatus = 'i' AND w.WellType = 'tw' THEN 'Inactive Test Holes'
WHEN w.WellStatus = 'ta' THEN 'Temporarily-Abandoned Wells'
WHEN w.WellStatus = 'pa' THEN 'Plugged and Abandoned Wells'
ELSE NULL
END
) x
WHERE x.WellCategory IS NOT NULL
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, x.WellCategory
FROM cte_Wells w
CROSS APPLY (
SELECT WellCategory = CASE
WHEN w.LateralStatus = 'NEW' THEN 'New Permits - Not Yet Approved'
WHEN w.LateralStatus = 'APD' THEN 'Permits Approved - Not Yet Commenced'
WHEN w.LateralStatus = 'DRL' THEN 'Drilling Commenced - Not Yet Completed'
WHEN w.LateralStatus = 'OPS' THEN 'Drilling Operations Suspended'
ELSE NULL
END
) x
WHERE x.WellCategory IS NOT NULL
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, WellCategory = 'Open Orphan Wells (no known operator)'
FROM cte_Wells w
WHERE w.WellStatus IN ('drl','ops','p','s','ta','pai','pii','sai','sii','a','i') AND w.Operator = 101600
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, WellCategory = 'Total Holes Not Yet Completed'
FROM cte_Wells w
WHERE w.WellStatus IN ('drl','ops')
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, WellCategory = 'Total Wells Capable of Production'
FROM cte_Wells w
WHERE (w.WellStatus IN ('p','s') AND w.WellType <> 'LI') OR w.WellStatus IN ('pai','pii','sai','sii')
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, WellCategory = 'Total Non-Plugged Wells'
FROM cte_Wells w
WHERE (w.WellStatus IN ('p','s') AND w.WellType <> 'LI') OR w.WellStatus IN ('drl','ops','ta','pai','pii','sai','sii','a','i')
-----------------
UNION ALL
-----------------
SELECT w.LeaseType, WellCategory = 'Total Wells Drilled'
FROM cte_Wells w
WHERE (w.WellStatus IN ('p','s') AND w.WellType <> 'LI') or w.WellStatus IN ('drl','ops','ta','pai','pii','sai','sii','a','i','pa')
) dt
GROUP BY dt.WellCategory
ORDER BY dt.WellCategory DESC
我已经根据您的示例数据和建议的预期结果检查了此查询的结果，它们似乎匹配。所以这会让你得到你想要的。但是，由于我不知道数据，您需要检查它是否存在逻辑错误和性能。
注意：此查询的结果不会生成空类别的计数。如果那是您需要的东西，请对此解决方案发表评论，我可以解决它。解决方法是添加一个包含所有类别的 table，然后 LEFT JOIN 到计数结果。