从同一行输出具有特殊编号的两行
Output two rows from the same row with special numbering
我有一个table个产品
ID Company Product Weight Price Date
-- ------- ------- ------ ----- ----
1 555 blanket 3 10 20201207
2 555 blanket 7 45 20201208
3 555 blanket 8 33 20201208
4 123 pillow 7 66 20200901
5 999 pillow 5 55 20200902
我需要这样的输出
Company|Product|Unit Type|Unit Amount|Numbering
------- ------- --------- ---------- ----
555 blanket weight 3 2020-1
555 blanket price 10 2020-1
555 blanket weight 7 2020-2
555 blanket price 45 2020-2
555 blanket weight 8 2020-3
555 blanket price 33 2020-3
123 pillow weight 7 2020-1
123 pillow price 66 2020-1
999 pillow weight 5 2020-1
999 pillow price 55 2020-1
我有此查询,但在 WHERE 子句 附近出现错误“无法绑定多部分标识符 p1.id”。也不确定如何编号,每个产品和公司最多 10 个,并且 2020 是从日期中提取的。似乎 CROSS APPLY 可能会解决主要问题,编号可能会用 ROW_NUMBER() 解决,但我还不能全神贯注。
SELECT
p1.company,
p1.product,
'weight',
p1.weight,
(CONVERT(VARCHAR(4), p1.date, 112)) + '-',
FROM Products p1
UNION ALL
SELECT
p2.company,
p2.product,
'price',
p2.price,
(CONVERT(VARCHAR(4), p2.date, 112)) + '-',
FROM Products p2
WHERE p1.id=p2.id
ORDER BY company
在 SQL 服务器中,您可以使用 cross apply
:
简单高效地取消透视
select t.company, t.product, x.unit_type, x.amount, t.date
from mytable t
cross apply (values ('weight', weight), ('price', price)) as x(unit_type, amount)
你可以用dense_rank()
生成序号:
select t.company, t.product, x.unit_type, x.amount,
concat(year(t.date), '-', dense_rank() over(partition by t.company, t.product, year(t.date) order by t.date, t.id)) as rn
from mytable t
cross apply (values ('weight', weight), ('price', price)) as x(unit_type, amount)
另一种选择是使用 UNPIVOT,它可以使您的代码非常干净。
例如:
SELECT ID, Company, Product, Description, Value, Date
FROM (SELECT * FROM Products) p
UNPIVOT
(
Unit_Amount FOR Unit_Type IN (Weight, Price)
) AS unpvt;
GO
我有一个table个产品
ID Company Product Weight Price Date
-- ------- ------- ------ ----- ----
1 555 blanket 3 10 20201207
2 555 blanket 7 45 20201208
3 555 blanket 8 33 20201208
4 123 pillow 7 66 20200901
5 999 pillow 5 55 20200902
我需要这样的输出
Company|Product|Unit Type|Unit Amount|Numbering
------- ------- --------- ---------- ----
555 blanket weight 3 2020-1
555 blanket price 10 2020-1
555 blanket weight 7 2020-2
555 blanket price 45 2020-2
555 blanket weight 8 2020-3
555 blanket price 33 2020-3
123 pillow weight 7 2020-1
123 pillow price 66 2020-1
999 pillow weight 5 2020-1
999 pillow price 55 2020-1
我有此查询,但在 WHERE 子句 附近出现错误“无法绑定多部分标识符 p1.id”。也不确定如何编号,每个产品和公司最多 10 个,并且 2020 是从日期中提取的。似乎 CROSS APPLY 可能会解决主要问题,编号可能会用 ROW_NUMBER() 解决,但我还不能全神贯注。
SELECT
p1.company,
p1.product,
'weight',
p1.weight,
(CONVERT(VARCHAR(4), p1.date, 112)) + '-',
FROM Products p1
UNION ALL
SELECT
p2.company,
p2.product,
'price',
p2.price,
(CONVERT(VARCHAR(4), p2.date, 112)) + '-',
FROM Products p2
WHERE p1.id=p2.id
ORDER BY company
在 SQL 服务器中,您可以使用 cross apply
:
select t.company, t.product, x.unit_type, x.amount, t.date
from mytable t
cross apply (values ('weight', weight), ('price', price)) as x(unit_type, amount)
你可以用dense_rank()
生成序号:
select t.company, t.product, x.unit_type, x.amount,
concat(year(t.date), '-', dense_rank() over(partition by t.company, t.product, year(t.date) order by t.date, t.id)) as rn
from mytable t
cross apply (values ('weight', weight), ('price', price)) as x(unit_type, amount)
另一种选择是使用 UNPIVOT,它可以使您的代码非常干净。 例如:
SELECT ID, Company, Product, Description, Value, Date
FROM (SELECT * FROM Products) p
UNPIVOT
(
Unit_Amount FOR Unit_Type IN (Weight, Price)
) AS unpvt;
GO