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在MySQL select语句IN子句中按值顺序排序？

2024-04-21 15:26:03 423

您可以将field()函数与ORDERBY子句一起使用，以按值顺序排序。语法如下

SELECT *FROM yourTableName
WHERE yourColumnName IN(Value1,Value2,Value3,.......N);
ORDER BY FIELD(yourColumnName ,Value1,Value2,Value3,.......N);

为了理解上述语法，让我们创建一个表。创建表的查询如下

mysql> create table SelectInDemo
   -> (
   -> StudentId int,
   -> StudentName varchar(100),
   -> StudentAge int
   -> );

使用insert命令在表中插入记录。查询如下

mysql> insert into SelectInDemo values(1,'Mike',23);

mysql> insert into SelectInDemo values(10,'Bob',21);

mysql> insert into SelectInDemo values(11,'Carol',30);

mysql> insert into SelectInDemo values(15,'Sam',24);

mysql> insert into SelectInDemo values(20,'John',26);

mysql> insert into SelectInDemo values(101,'David',27);

mysql> insert into SelectInDemo values(96,'Justin',23);

使用select语句显示表中的所有记录。查询如下

mysql> select *from SelectInDemo;

以下是输出

+-----------+-------------+------------+
| StudentId | StudentName | StudentAge |
+-----------+-------------+------------+
|         1 | Mike        |         23 |
|        10 | Bob         |         21 |
|        11 | Carol       |         30 |
|        15 | Sam         |         24 |
|        20 | John        |         26 |
|       101 | David       |         27 |
|        96 | Justin      |         23 |
+-----------+-------------+------------+
7 rows in set (0.00 sec)

这是在MySQL中将IN与SELECT语句一起使用的查询

mysql> select *from SelectInDemo
   -> where StudentId IN(1,96,101,10,15,11,20)
   -> order by field(StudentId,1,96,101,10,15,11,20);

以下是输出

+-----------+-------------+------------+
| StudentId | StudentName | StudentAge |
+-----------+-------------+------------+
|         1 | Mike        |         23 |
|        96 | Justin      |         23 |
|       101 | David       |         27 |
|        10 | Bob         |         21 |
|        15 | Sam         |         24 |
|        11 | Carol       |         30 |
|        20 | John        |         26 |
+-----------+-------------+------------+
7 rows in set (0.00 sec)

让我们看看另一个订单。

对于二阶查询如下。

mysql> select *from SelectInDemo
   -> where StudentId IN(1,10,11,15,20,101,96)
   -> order by field(StudentId,1,10,11,15,20,101,96);

以下是outpu

+-----------+-------------+------------+
| StudentId | StudentName | StudentAge |
+-----------+-------------+------------+
|         1 | Mike        |         23 |
|        10 | Bob         |         21 |
|        11 | Carol       |         30 |
|        15 | Sam         |         24 |
|        20 | John        |         26 |
|       101 | David       |         27 |
|        96 | Justin      |         23 |
+-----------+-------------+------------+
7 rows in set (0.00 sec)

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在MySQL select语句IN子句中按值顺序排序？

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