摘要:
select * from b where id=5;update a set id=88 where cid=6;delete * from where id=6;insert into a (title,content) values ("values1",'values2');select a... 阅读全文
摘要:
表A记录如下:aID aNum1 a200501112 a200501123 a200501134 a200501145 a20050115表B记录如下:bID bName1 20060324012 20060324023 20060324034 20060324048 2006032408创建这两... 阅读全文
摘要:
除了常用的两个表连接之外,SQL(MySQL) JOIN 语法还支持多表连接。多表连接基本语法如下:1...FROMtable1INNER|LEFT|RIGHTJOINtable2ONconditionINNER|LEFT|RIGHTJOINtable3ONcondition ...JOIN 多表连... 阅读全文