MySQL 如何使MySQL结果集与指定结果相同

为此，请使用MySQL FIND_IN_SET()。让我们首先创建一个表 –

mysql> create table DemoTable1563
   -> (
   -> StudentId int,
   -> StudentName varchar(20)
   -> );
Query OK, 0 rows affected (0.52 sec)

使用插入命令将一些记录插入表中 –

mysql> insert into DemoTable1563 values(1001,'Chris');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable1563 values(1010,'Bob');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable1563 values(1005,'Chris');
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable1563 values(1015,'David');
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable1563 values(1030,'Mike');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable1563 values(1020,'Sam');
Query OK, 1 row affected (0.14 sec)

使用select语句从表中显示所有记录 –

mysql> select * from DemoTable1563;

这将产生以下输出 –

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
|      1001 | Chris       |
|      1010 | Bob         |
|      1005 | Chris       |
|      1015 | David       |
|      1030 | Mike        |
|      1020 | Sam         |
+-----------+-------------+
6 rows in set (0.00 sec)

以下是将MySQL结果集形成与指定结果相同的查询 –

mysql> select * from DemoTable1563
   -> where StudentId IN(1001,1030,1010,1020)
   -> order by find_in_set(StudentId,'1001,1030,1010,1020');

这将产生以下输出 –

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
|      1001 | Chris       |
|      1030 | Mike        |
|      1010 | Bob         |
|      1020 | Sam         |
+-----------+-------------+
4 rows in set (0.00 sec)

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