首先我这有两份数据;
两张表的内容如下:
执行sql 语句:
四句sql语句对应如下:
1, insert into yu name,age select name,2 as age from ziyao;
2,insert into yu (name,age) select name,age from ziyao;
3,insert into yu (name) select name from ziyao;
4,insert into yu name select name from ziyao;
可见加了括号的没有报错,没有加括号的报错了!