DROP TABLE user ;    -- 删除表
CREATE TABLE user(
    id        INT        AUTO_INCREMENT PRIMARY KEY ,
    name        VARCHAR(30)    NOT NULL ,
    password     VARCHAR(32)    NOT NULL ,
    age        INT        NOT NULL ,
    sex        VARCHAR(2)    DEFAULT '' ,
    birthday    DATE 
) ;

INSERT INTO user(name,password,age,sex,birthday) VALUES ('李兴华','www.mldn.cn',30,'','2008-08-27') ;
INSERT INTO user(name,password,age,sex,birthday) VALUES ('李康','www.mldnjava.cn',23,'','2005-08-27') ;


DELETE FROM user WHERE id=3 ;

UPDATE user SET name='MLDN',age=5,birthday='2000-08-27' WHERE id=4 ;

SELECT name,birthday FROM user ;

SELECT * FROM user WHERE name LIKE '%m%' OR password LIKE '%m%' ;

SELECT * FROM user WHERE name LIKE '%m%' OR password LIKE '%m%' LIMIT 10,5 ;