Question

我正在尝试根据子操作更新父操作。如果所有子记录都是“D”操作，请将父操作设置为“D”。否则，保持父操作不变。这是我到目前为止的查询。我想帮助摆脱硬编码的值：

UPDATE tableA
SET parentOperation = CASE 
        WHEN (
                SELECT DISTINCT childOperation
                FROM (
                    SELECT text_number
                        ,text_type
                        ,childOperation
                    FROM tableA
                    WHERE id = '1'
                        AND VERSION = 100
                    )
                ) = 'D'
            THEN 'D'
        ELSE parentOperation
        END
WHERE id = '1'
    AND version = 100;

示例数据：

calculated_id (primary key) id  version parentOperation text_number text_type   childOperation
1_10    1   100 U   10  aa  D
1_20    1   100 U   20  bb  D
2_10    2   100 U   10  aa  D
2_20    2   100 U   20  bb  U

预期产出

calculated_id (primary key) id  version parentOperation text_number text_type   childOperation
1_10    1   100 D   10  aa  D
1_20    1   100 D   20  bb  D
2_10    2   100 U   10  aa  D
2_20    2   100 U   20  bb  U

Answer 1

尝试：

UPDATE tableA a
SET parentOperation = 'D'
WHERE NOT EXISTS(
   SELECT null FROM tableA b
   WHERE (a.id, a.VERSION) = (b.id, b.VERSION) 
     AND b.childOperation <> 'D'
)
WHERE id = '1'
  AND version = 100;

Answer 2

试试这个：

UPDATE tableA p
  SET parentOperation = childOperation
 WHERE 1 = (  SELECT COUNT (DISTINCT childOperation)
                FROM tableA c
               WHERE c.id = p.id 
                 AND c.version = p.version
            GROUP BY id, version
              HAVING COUNT (DISTINCT childOperation) = 1);

Oracle SQL Update父记录取决于同一个表中的子记录

2 个答案: