mysql 기본 상식 (1)

service mysql start

service mysql stop

service mysql restart

 sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf

    bind-address=127.0.0.1    

  mysql -hlocalhost -uroot -p

    ：grant all privileges on *.* to 'root'@'%' identified by 'mysql' with grant option;

    ：flush privileges;

mysql>   grant all privileges on . to ‘root’@’%’ identified by ‘  ’;

mysql>   flush privileges;

                                                 
  TINYINT                                  1   
  INT(INTEGER)                           4   
  DECIMAL(M,D)          “  ”              M>D M+2   ，   D+2

                                                 
  CHAR(M)                             M  ，1<=M<=255
  VARCHAR(L)                            L+1  
  TEXT                                  L+2  ，  L<2^16

mysql -uroot -p

quit exit

     ：select version();

       ：select now();

    ：          ;

mysql -hip   -uroot -p

create database      charset=utf8;

drop database     ;

use     ;

select database();

show tables;

 auto_incremeaa      

 alter table    add|change|drop      ;

    eg： alter table students add birthday datetime;

drop table   ;

desc   ;

rename table     to    ;

show create table '  ';

select * from   

    ：insert into    values(...)

    ：insert into   ( 1,...) values( 1,...)

        ：insert into    values(...),(...)...;

                insert into   ( 1,...) values( 1,...),( 1,...)...;

update    set  1= 1,... where   

delete from    where   

alter table students add isdelete bit default 0;

  update students isdelete=1 where ...;

sudo -s

cd /var/lib/mysql

Mysql dump –uroot –p      > ~/Desktop/    .sql;

mysql -uroot –p      < ~/Desktop/    .sql