MySQL:如何在SQL查询中为每个结果插入记录？

Question

说我有一个选择

SELECT DISTINCT id, customer_id, domain FROM config WHERE type = 'foo';

返回一些记录.

如何在结果集中为到达行执行插入操作

INSERT INTO config (id, customer_id, domain) VALUES (@id, @customer_id, 'www.example.com');

这里@id和@customer_id在结果中的行的字段中设置？

编辑:我不想只复制它,而是在字段中插入一个新值domain.然而,一个facepalm - 情况,因为它很容易;-)谢谢!

Answer 1

就这么简单:

INSERT INTO config (id, customer_id, domain) 
SELECT DISTINCT id, customer_id, domain FROM config;

如果您想要" www.example.com"作为域名,您可以:

INSERT INTO config (id, customer_id, domain) 
SELECT DISTINCT id, customer_id, 'www.example.com' FROM config;

Answer 2

INSERT INTO config (id, customer_id, domain)
SELECT id, customer_id, 'www.example.com' FROM (
  SELECT DISTINCT id, customer_id, domain FROM config
  WHERE type = 'foo'
) x;

Answer 3

INSERT INTO Config (id, customer_id, domain)
SELECT DISTINCT id, customer_id, 'www.example.com' FROM config

这种语法的MySQL文档在这里:

http://dev.mysql.com/doc/refman/5.1/en/insert-select.html