MySQL TENSE

 
                                        MySQL TENSE



//modify table to add primary key

alter table pcc3register add  primary key( id);

alter table pcc3register change  id id int  auto_increment;

//change field type and add primary key auto_increment;

alter table test change a a int primary key auto_increment;

//truncate table

truncate table business.pcc3register



//change field type and name

alter table pcc3register change  motxt motxtcontent varchar(500) ;

//add column to table

alter table pcc3register add motxturl varchar(100) ;

//set default

alter table pcc3register add (registerdate timestamp  default now() );

 //add  columns

alter table pcc3register add (mopic varchar(100),motxt varchar(500) );

//grant



grant select,insert,update on mms.* to daful1@”%” identified by “tom8*8mad”;




show grants for root@‘localhost’;

grant all on *.* to ‘abc’@192.168.1.7 identified by ‘abcdef’;



REVOKE privileges (columns) ON what FROM user



revoke select on mysql.* from webUser;






you can’t create two timestamp datetype column in a table in mysql !!