MySQL增删查改操作

mysql> insert into mysql_test.cust

        -> values(901,'张三','F','北京市','朝阳区');

mysql> select * from mysql_test.cust;

mysql> insert into mysql_test.cust

        -> values(902,'王五','F','北京市','朝阳区'),(903,'李四','M','北京市','朝阳区');

mysql> insert into mysql_test.cust

        -> values(0,'赵六',default,'北京市',null);

mysql> insert into mysql_test.cust

        -> set cust_name='xiaohan',cust_city='北京市',cust_sex=default;   //使用insert ... select 语句插入子查询数据

mysql> delete from mysql_test.cust

        -> where cust_name='李四';

mysql> update mysql_test.cust

　　 -> set cust_address='武汉市'

        -> where cust_name='张三';

mysql> select cust_name,cust_sex,cust_address

　　 -> from mysql_test.cust;

mysql> select *  from mysql_test.cust;

mysql> select cust_name,cust_address as dizhi

　　 -> from mysql_test.cust;

mysql> select cust_name,

　　 -> case

　　 -> when cust_sex='M' then '男'

　　 -> else '女'

　　 -> end as 性别

　　 -> from mysql_test.cust;

mysql> select cust_name,cust_sex,cust_id+100

　　 -> from mysql_test.cust;

mysql> select *  from tb1 cross join tb2;     //交叉连接,又称笛卡尔积  简化:select *  from tb1, tb2; 

mysql> select * from tb_student inner join tb_score  //内连接

　　 -> on tb_student.studentNo=tb_score.studentNo; 

mysql> select * from tb_student left outer join tb_score  //左外连接 简化:left join 右外连接同理

　　 -> on tb_student.studentNo=tb_score.studentNo;