ORA-30926: 无法在源表中获得一组稳定的行
我得到了
ORA-30926: 无法在源表中获得一组稳定的行
ORA-30926: unable to get a stable set of rows in the source tables
在以下查询中:
MERGE INTO table_1 a
USING
(SELECT a.ROWID row_id, 'Y'
FROM table_1 a ,table_2 b ,table_3 c
WHERE a.mbr = c.mbr
AND b.head = c.head
AND b.type_of_action <> '6') src
ON ( a.ROWID = src.row_id )
WHEN MATCHED THEN UPDATE SET in_correct = 'Y';
我运行了 table_1
它有数据,我也运行了内部查询 (src
),它也有数据.
I've ran table_1
it has data and also I've ran the inside query (src
) which also has data.
为什么会出现这个错误,如何解决?
Why would this error come and how can it be resolved?
推荐答案
这通常是由 USING 子句中指定的查询中的重复项引起的.这可能意味着 TABLE_A 是父表,并且多次返回相同的 ROWID.
This is usually caused by duplicates in the query specified in USING clause. This probably means that TABLE_A is a parent table and the same ROWID is returned several times.
您可以通过在查询中使用 DISTINCT 来快速解决问题(实际上,如果Y"是一个常量值,您甚至不需要将其放入查询中).
You could quickly solve the problem by using a DISTINCT in your query (in fact, if 'Y' is a constant value you don't even need to put it in the query).
假设您的查询是正确的(不知道您的表),您可以执行以下操作:
Assuming your query is correct (don't know your tables) you could do something like this:
MERGE INTO table_1 a
USING
(SELECT distinct ta.ROWID row_id
FROM table_1 a ,table_2 b ,table_3 c
WHERE a.mbr = c.mbr
AND b.head = c.head
AND b.type_of_action <> '6') src
ON ( a.ROWID = src.row_id )
WHEN MATCHED THEN UPDATE SET in_correct = 'Y';
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