获取 table 中多个分区上与另一条记录的特定条件匹配的所有记录

Question

我有以下 view/table T:

+--------+--------------+-------+----------+
| row_id | batch_status | class | batch_id |
+--------+--------------+-------+----------+
| 1      | new          | K1    | B1       |
+--------+--------------+-------+----------+
| 2      | proc         | K1    | B2       |
+--------+--------------+-------+----------+
| 3      | proc         | K1    | B3       |
+--------+--------------+-------+----------+
| 4      | proc         | K1    | B1       |
+--------+--------------+-------+----------+
| 5      | finish       | K1    | B1       |
+--------+--------------+-------+----------+
| 6      | new          | K2    | B5       |
+--------+--------------+-------+----------+
| 7      | proc         | K2    | B2       |
+--------+--------------+-------+----------+
| 8      | new          | K3    | B2       |
+--------+--------------+-------+----------+
| 9      | proc         | K3    | B5       |
+--------+--------------+-------+----------+
| 10     | finish       | K3    | B1       |
+--------+--------------+-------+----------+
| 11     | finish       | K3    | B2       |
+--------+--------------+-------+----------+
| 12     | new          | K4    | B7       |
+--------+--------------+-------+----------+
| 13     | new          | K5    | B2       |
+--------+--------------+-------+----------+

其中记录分布在 5 个 class 中：k1 -> k5。

现在 对于每个 class 组，我需要显示其 ID 与状态 'new' 的 batch_id 相匹配的批次].这意味着需要排除的是（红色交叉线）。没有划线的是需要显示的记录：

关系数据库管理系统：Oracle 12c

Answer 1

是否： Select这一行如果存在，在同一个table，同一个行batch_id和class和batch_status=new.

Select *
From T as T1
Where
Exists (select 1
From T as T2
Where T2.batch_status='new'
And T2.batch_id=T1.batch_id
And T2.class=T1.class)

Answer 2

您可以使用带条件的 COUNT() OVER () 分析函数来检查每个 class 和 [=16] 是否存在等于值 new 的任何 batch_status =] 比如

SELECT row_id, batch_status, class, batch_id
  FROM (SELECT t.*,
               COUNT(CASE
                       WHEN batch_status = 'new' THEN
                        1
                     END) OVER(PARTITION BY class, batch_id) AS cnt
          FROM t)
 WHERE cnt > 0
 ORDER BY class

或者不使用子查询（因为你的数据库版本是 12c）

SELECT t.*,
       COUNT(CASE
               WHEN batch_status = 'new' THEN
                    1
                END) OVER (PARTITION BY class, batch_id) AS cnt
  FROM t
 ORDER BY SIGN(cnt) DESC
 FETCH FIRST 1 ROW WITH TIES

Demo

获取 table 中多个分区上与另一条记录的特定条件匹配的所有记录

Get all records that matches a specific criteria of another records over multiple partitions in the table

sql

oracle

group-by

oracle12c

partitioning