摘要: 一、where in详解 1、in后面是记录集; 如:select * from table where uname in(select uname from user); 2、in后面是字符串; 如:select * from table where uname in('aaa',bbb','cc 阅读全文
posted @ 2017-10-31 20:13 Geek仁杰 阅读(169) 评论(0) 推荐(0) 编辑