mysql 创建表并设置主键自增

 mysql 创建表：

 mysql> create table user(
     -> userid int ( 4 ) primary key not  null  auto_increment,
     -> username varchar(16 ) not  null ,
     -> userpassword varchar(32 ) not  null
     -> );



 create table log(
 logid int ( 4 ) primary key not  null  auto_increment,
 logtitle varchar(32 ) not  null ,
 logcontent varchar(160 ) not  null ,
 logtime datetime not null ,
 userip varchar(64 ) not  null
 );