weixin_44498832的博客

MYSQL 双表联合查询,通过A表数组查询B表对应的数据

创建数据库、表create database tests;use tests;create table t_score(id int primary key auto_increment,name varchar(20) not null, #名字Subject varchar(10) not null, #科目Fraction double default 0 #分数);添加数据INSERT INTO `t_score`(name,Subject,Fract...