MySQL 表数据 的常用SQL语句

1:insert  into 表名 values(); 向表里添加数据

                     INSERT INTO badboy VALUES(NULL,"手机哥",58);

                     INSERT INTO badboy VALUES(9527,"堕落哥",18);

2:指定字段添加  缺省插入

                   INSERT INTO badboy (id,name,age) VALUES(NULL,"吴金航",10);

                   INSERT INTO teachers(id,name,email,address,age) VALUES(NULL,"hd","[email protected]","庞各庄",40);

3:插入多列数据

                  INSERT INTO badboy (id,name,age) VALUES(NULL,"吴金航",10),(NULL,"刘博宇",17),(NULL,"杜登进",21),(NULL,"陈怀勇",18);

4: 将     badboy   表里的数据重定向到新表    goodboy

                 INSERT INTO goodboy(id,name,age) select  stu_id,name,age FROM badboy;

5:update 表名   set 列 =值;修改表里所有列的内容

                 UPDATE badboy set name = "limingrui";

6:用  where 过滤指定修改那条数据

                 UPDATE badboy set age = 20 WHERE stu_id = 10000;

7:删除表里所有数据,保留表结构

                DELETE FROM badboy;

                TRUNCATE badboy;

8:用 where 过滤字段指定删除那条数据

                DELETE FROM badboy where name = "limingrui";

10:创建表 COMMENT  "  "注释

 CRETAE TABLE boy(

                                    id int NOT NULL PRIMARY KEY AUT0_INCREMENT COMMNET "id",

                                   name varchar(20) NOT NULL COMMNET "姓名",

                                   age int(2) NOT NULL COMMNET "年龄"

) COMMNET "男孩子";