Mysql 입문 독서 노트

1.     

    1. sum()   avg()    null,         null
    2. MAX MIN                ,     
2.       select       
3.             :

    1. select      distinct
    2. from        
    3.    group by  
    4.    having  
4. where           
5.         null     null
6. COALESCE(NULL,1)           null  ,       null     
7. select * from sm_user where u_account like 'abc__'