小编LOV*_*ING的帖子

整理在SQL中意味着什么,它的作用是什么？

我创建了表stu_dep_det

CREATE TABLE  `stu_dept_cs` (
  `s_d_id` int(10) unsigned NOT NULL auto_increment,
  `stu_name` varchar(15) , `gender` varchar(15) , `address` varchar(15),`reg_no` int(10) ,
  `ex_no` varchar(10) ,
  `mark1` varchar(10) ,
  `mark2` varchar(15) ,
  `mark3` varchar(15) ,
  `total` varchar(15) ,
  `avg` double(2,0),
  PRIMARY KEY  (`s_d_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC AUTO_INCREMENT=8 ;

然后插入值

INSERT INTO `stu_dept_cs` (`s_d_id`, `stu_name`, `gender`, `address`, `reg_no`, `ex_no`, `mark1`, `mark2`, `mark3`, `total`, `avg`) VALUES
(1, 'alex', 'm', 'chennai', 5001, 's1', '70', '90', '95', '255', 85),
(2, 'peter', 'm', 'chennai', 5002, …