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如何使MySQL结果集与指定的相同？

2024-04-30 17:42:07 364

为此，请使用MySQLFIND_IN_SET()。让我们首先创建一个表-

mysql> create table DemoTable1563
   -> (
   -> StudentId int,
   -> StudentName varchar(20)
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable1563 values(1001,'Chris');
mysql> insert into DemoTable1563 values(1010,'Bob');
mysql> insert into DemoTable1563 values(1005,'Chris');
mysql> insert into DemoTable1563 values(1015,'David');
mysql> insert into DemoTable1563 values(1030,'Mike');
mysql> insert into DemoTable1563 values(1020,'Sam');

使用select语句显示表中的所有记录-

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)

这是形成与指定结果相同的MySQL结果集的查询-

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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如何使MySQL结果集与指定的相同？

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