在MySQL中按最后3个字符排序？

  • Z时代
  • 2024-01-10
  • 分类：综合

您可以使用ORDER BYRIGHT()函数在MySQL中按最后3个字符排序。语法如下-

SELECT *FROM yourTableName
ORDER BY RIGHT(yourColumnName,3) yourSortingOrder;

只需将“ yourSortingOrder”替换为ASC或DESC即可分别设置升序或降序。

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 OrderByLast3Chars
   -> (
   -> EmployeeId int NOT NULL AUTO_INCREMENT,
   -> EmployeeName varchar(20),
   -> EmployeeAge int,
   -> PRIMARY KEY(EmployeeId)
   -> );

使用insert命令在表中插入一些记录。查询如下-

mysql> insert into OrderByLast3Chars(EmployeeName,EmployeeAge) values('Carol_901',24);
mysql> insert into OrderByLast3Chars(EmployeeName,EmployeeAge) values('Bob_101',21);
mysql> insert into OrderByLast3Chars(EmployeeName,EmployeeAge) values('Sam_107',22);
mysql> insert into OrderByLast3Chars(EmployeeName,EmployeeAge) values('Mile_677',26);
mysql> insert into OrderByLast3Chars(EmployeeName,EmployeeAge) values('John_978',27);
mysql> insert into OrderByLast3Chars(EmployeeName,EmployeeAge) values('David_876',29);

使用select语句显示表中的所有记录。查询如下-

mysql> select *from OrderByLast3Chars;

以下是输出-

+------------+--------------+-------------+
| EmployeeId | EmployeeName | EmployeeAge |
+------------+--------------+-------------+
| 1          | Carol_901    | 24          |
| 2          | Bob_101      | 21          |
| 3          | Sam_107      | 22          |
| 4          | Mile_677     | 26          |
| 5          | John_978     | 27          |
| 6          | David_876    | 29          |
+------------+--------------+-------------+
6 rows in set (0.00 sec)

这是按最后3个字符排序的查询。

情况1-按升序获取结果。

查询如下-

mysql> select *from OrderByLast3Chars
   -> order by RIGHT(EmployeeName,3) asc;

以下是输出-

+------------+--------------+-------------+
| EmployeeId | EmployeeName | EmployeeAge |
+------------+--------------+-------------+
|          1 | Carol_901    |          24 |
|          2 | Bob_101      |          21 |
|          3 | Sam_107      |          22 |
|          4 | Mile_677     |          26 |
|          5 | John_978     |          27 |
|          6 | David_876    |          29 |
+------------+--------------+-------------+
6 rows in set (0.00 sec)

情况2-按降序获取结果。查询如下-

mysql> select *from OrderByLast3Chars
   -> order by RIGHT(EmployeeName,3) desc;

以下是输出-

+------------+--------------+-------------+
| EmployeeId | EmployeeName | EmployeeAge |
+------------+--------------+-------------+
|          5 | John_978     |          27 |
|          1 | Carol_901    |          24 |
|          6 | David_876    |          29 |
|          4 | Mile_677     |          26 |
|          3 | Sam_107      |          22 |
|          2 | Bob_101      |          21 |
+------------+--------------+-------------+
6 rows in set (0.00 sec)

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