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问题描述
我想将插入查询与不存在的地方"结合起来,以免违反 PK 约束.但是,如下所示的语法给了我一个 Incorrect syntax near the keyword 'WHERE' 错误 -
I'd like to combine an insert query with a "where not exists" so as not to violate PK constraints. However, syntax such as the following gives me an Incorrect syntax near the keyword 'WHERE' error -
INSERT INTO myTable(columns...) VALUES(values...) WHERE NOT EXISTS (SELECT * FROM myTable WHERE pk_part1 = value1, AND pk_part2 = value2)我怎样才能做到这一点?
How can I accomplish this?
(一般来说,你可以将插入与 where 子句结合起来吗?)
(In general, can you combine an insert with a where clause?)
推荐答案 INSERT INTO myTable(columns...) Select values... WHERE NOT EXISTS (SELECT * FROM myTable WHERE pk_part1 = value1, AND pk_part2 = value2)阅读马丁斯链接后,如果承认,最好的解决方案是:
After reading martins link, If admit, that the best solution is:
BEGIN TRY INSERT INTO myTable(columns...) values( values...) END TRY BEGIN CATCH IF ERROR_NUMBER() <> 2627 RAISERROR etc END CATCH;更多推荐
如何在不存在的地方进行插入?
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