本文介绍了将插入与选择语句合并的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
这对我有用
MERGE Table1 AS tgt
USING
(
SELECT
TOP 1
*
FROM
Table2,
(
SELECT
itmid
FROM
Table3
WHERE
id = @id
) as a
WHERE
id = @id
) AS src
ON ( tgt.id = src.id )
WHEN MATCHED THEN
UPDATE SET qty = qty + @qty
WHEN NOT MATCHED THEN
INSERT itmid
VALUES itmid;
但是当我这样改变时，它不起作用，在最后一个 select
But when i change like this, its not working, showing error near last select
MERGE Table1 AS tgt
USING
(
SELECT
TOP 1
*
FROM
Table2
WHERE
id = @id
) AS src
ON ( tgt.id = src.id )
WHEN MATCHED THEN
UPDATE SET qty = qty + @qty
WHEN NOT MATCHED THEN
INSERT itmid
SELECT itmid FROM Table3 WHERE id = @id;
推荐答案
根据MSDN 文档
<merge_not_matched>::=
{
INSERT [ ( column_list ) ]
{ VALUES ( values_list )
| DEFAULT VALUES }
}
INSERT from SELECT 的语法如:
WHEN NOT MATCHED THEN
INSERT itmid SELECT itmid FROM Table3 WHERE id=@id;
不允许！
我会尝试通过与 Table3 进行另一次合并来解决您的问题.
I would try to solve your problem doing another merge with Table3.
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