用 SELECT 插入

沃梦达教程数据库问题

2022-01-01

INSERT with SELECT(用 SELECT 插入)

本文介绍了用 SELECT 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！

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

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

解决方案

Yes, absolutely, but check your syntax.

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

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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