摘要:
连表查询 #建表 create table department( id int, name varchar(20) ); create table employee( id int primary key auto_increment, name varchar(20), sex enum('ma 阅读全文
摘要:
mysql> create table employee( -> id int primary key auto_increment, -> emp_name char(12) not null, -> sex enum('male','female') not null default 'male 阅读全文