本文介绍了如何在不存在的地方进行插入?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
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;
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