使用 SELECT 插入

INSERT with SELECT(使用 SELECT 插入)

问题描述

我有一个使用 SELECT 语句插入的查询:

I have a query that inserts using a SELECT statement:

INSERT INTO courses (name, location, gid) 
SELECT name, location, gid 
FROM courses 
WHERE cid = $cid

是否可以只选择名称、位置"?用于插入，并将 gid 设置为查询中的其他内容?

Is it possible to only select "name, location" for the insert, and set gid to something else in the query?

推荐答案

是的，绝对可以，但请检查您的语法.

Yes, absolutely, but check your syntax.

INSERT INTO courses (name, location, gid)
SELECT name, location, 1
FROM   courses
WHERE  cid = 2

当然，您可以在其位置放置一个与 gid 类型相同的常量，而不仅仅是 1.而且，我只是编造了 cid 值.

You can put a constant of the same type as gid in its place, not just 1, of course. And, I just made up the cid value.

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