MySQL中按字符数排序的方法
要按字符数排序,请使用ORDER BY和LENGTH()方法。以下是语法-
select *from yourTableName order by LENGTH(yourColumnName) DESC;
让我们首先创建一个表-
mysql− create table DemoTable-> (
-> Name varchar(100)
-> );
Query OK, 0 rows affected (0.50 sec)
使用插入命令在表中插入一些记录-
insert into DemoTable values('John');insert into DemoTable values('Robert');
insert into DemoTable values('Bob');
insert into DemoTable values('David');
使用select语句显示表中的所有记录-
select *from DemoTable;
输出结果
+--------+| Name |
+--------+
| John |
| Robert |
| Bob |
| David |
+--------+
4 rows in set (0.00 sec)
以下是按字符数排序的查询-
select *from DemoTable order by LENGTH(Name) DESC;
输出结果
+--------+| Name |
+--------+
| Robert |
| David |
| John |
| Bob |
+--------+
4 rows in set (0.00 sec)
以上是 MySQL中按字符数排序的方法 的全部内容, 来源链接: utcz.com/z/331602.html