从 SQL SERVER 中的 CTE 中删除行

Delete rows from CTE in SQL SERVER(从 SQL SERVER 中的 CTE 中删除行)

问题描述

我有一个 CTE，它是一个表上的选择语句.现在，如果我从 CTE 中删除 1 行，它会从我的基表中删除该行吗?

I have a CTE which is a select statement on a table. Now if I delete 1 row from the CTE, will it delete that row from my base table?

如果我有一个临时表而不是 CTE，也是同样的情况吗?

Also is it the same case if I have a temp table instead of CTE?

推荐答案

检查 DELETE 语句文档，是，您可以使用 CTE 从中删除，它会影响基础表.同样对于 UPDATE 语句...

Checking the DELETE statement documentation, yes, you can use a CTE to delete from and it will affect the underlying table. Similarly for UPDATE statements...

如果我有一个临时表而不是 CTE，也是同样的情况吗?

Also is it the same case if I have a temp table instead of CTE?

不，从临时表中删除只会影响临时表——数据来自的表没有连接，临时表是一个独立的对象.

No, deletion from a temp table will affect the temp table only -- there's no connection to the table(s) the data came from, a temp table is a stand alone object.

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