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使用“ 2321/78 / 54-6”等特殊字符对记录进行排序

2024-04-26 01:20:04 389

要排序，请使用ORDERBYSUBSTRING()。让我们首先创建一个表-

mysql> create table DemoTable
   -> (
   -> Value varchar(40)
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values('2321/78/54-6')
   -> ;
mysql> insert into DemoTable values('2321/78/54-8');
mysql> insert into DemoTable values('2321/78/54-5');
mysql> insert into DemoTable values('2321/78/54-9');

使用select语句显示表中的所有记录-

mysql> select * from DemoTable;

这将产生以下输出-

+--------------+
| Value        |
+--------------+
| 2321/78/54-6 |
| 2321/78/54-8 |
| 2321/78/54-5 |
| 2321/78/54-9 |
+--------------+
4 rows in set (0.00 sec)

这是对带有特殊字符的记录进行排序的查询-

mysql> select * from DemoTable
   -> where Value like '2321/78/54%'
   -> order by substring(Value from 1 for 10),cast(substring(Value from 11) as decimal);

这将产生以下输出-

+--------------+
| Value        |                                                                                             +--------------+
| 2321/78/54-9 |
| 2321/78/54-8 |
| 2321/78/54-6 |
| 2321/78/54-5 |
+--------------+
4 rows in set (0.05 sec)

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使用“ 2321/78 / 54-6”等特殊字符对记录进行排序

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