获取MySQL'IN'子句中按（ORDER BY）位置排序的返回记录集

要返回记录集顺序，您需要使用FIND_IN_SET()。让我们首先创建一个表-

mysql> create table recordSetOrderDemo
   -> (
   -> EmployeeId int,
   -> EmployeeName varchar(30)
   -> );

以下是使用insert命令在表中插入一些记录的查询-

mysql> insert into recordSetOrderDemo values(20,"John");

mysql> insert into recordSetOrderDemo values(10,"Larry");

mysql> insert into recordSetOrderDemo values(100,"Mike");

mysql> insert into recordSetOrderDemo values(50,"Sam");

mysql> insert into recordSetOrderDemo values(10,"David");

以下是使用select语句显示表中所有记录的查询-

mysql> select *from recordSetOrderDemo;

这将产生以下输出-

+------------+--------------+
| EmployeeId | EmployeeName |
+------------+--------------+
| 20         | John         |
| 10         | Larry        |
| 100        | Mike         |
| 50         | Sam          |
| 10         | David        |
+------------+--------------+
5 rows in set (0.00 sec)

以下是查询以返回记录集顺序-

mysql> select *from recordSetOrderDemo where EmployeeId IN(100,10,20,50)
-> ORDER BY FIND_IN_SET(EmployeeId,'100,10,20,50');

这将产生以下输出-

+------------+--------------+
| EmployeeId | EmployeeName |
+------------+--------------+
| 100        | Mike         |
| 10         | Larry        |
| 10         | David        |
| 20         | John         |
| 50         | Sam          |
+------------+--------------+
5 rows in set (0.03 sec)