MySQL查询ORDER BY`user_id` IN(1,2,3)和`name`进行自定义排序
要实现IN()自定义排序，请使用ORDERBYCASE。
让我们首先创建一个表-
mysql> create table DemoTable752 ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(100) );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable752(Name) values('John');
mysql> insert into DemoTable752(Name) values('Carol');
mysql> insert into DemoTable752(Name) values('Bob');
mysql> insert into DemoTable752(Name) values('Mike');
mysql> insert into DemoTable752(Name) values('Sam');
mysql> insert into DemoTable752(Name) values('Adam');
mysql> insert into DemoTable752(Name) values('Chris');使用select语句显示表中的所有记录-
mysql> select *from DemoTable752;
这将产生以下输出-
+----+-------+ | Id | Name | +----+-------+ | 1 | John | | 2 | Carol | | 3 | Bob | | 4 | Mike | | 5 | Sam | | 6 | Adam | | 7 | Chris | +----+-------+ 7 rows in set (0.00 sec)
以下是使用自定义值排序的查询-
mysql> select *from DemoTable752
order by
case
when Id IN (1,2,3) then 1
else Id
END,
Name;这将产生以下输出-
+----+-------+ | Id | Name | +----+-------+ | 3 | Bob | | 2 | Carol | | 1 | John | | 4 | Mike | | 5 | Sam | | 6 | Adam | | 7 | Chris | +----+-------+ 7 rows in set (0.00 sec)