按最后2个字符排序字符串sql

This is the result of my query, but it doesn't order correctly. I want to order by the last 2 characters. The result should be: Fa0/10 below Fa0/9.

这是我的查询的结果,但它没有正确排序。我想按最后2个字符排序。结果应该是:Fa0 / 10低于Fa0 / 9。

Fa0/1
Fa0/10
Fa0/11
Fa0/12
Fa0/2
Fa0/3
Fa0/4
Fa0/5
Fa0/6
Fa0/7
Fa0/8
Fa0/9
Gi0/1
Gi0/2
Null0
Vlan1

My query:

SELECT inft.port FROM interfaces AS intf ORDER BY RIGHT(intf.port + 0, 2)

second edit: sqlfiddle

第二次编辑:sqlfiddle

4 个解决方案

#1

Try this:

SELECT port 
FROM interfaces 
ORDER BY SUBSTRING_INDEX(port, '/', 1), CAST(SUBSTRING_INDEX(port, '/', -1) AS SIGNED)

Check the SQL FIDDLE DEMO

检查SQL FIDDLE DEMO

OUTPUT

|   PORT |
|--------|
|  Fa0/1 |
|  Fa0/2 |
|  Fa0/3 |
|  Fa0/4 |
|  Fa0/5 |
|  Fa0/6 |
|  Fa0/7 |
|  Fa0/8 |
|  Fa0/9 |
| Fa0/10 |
| Fa0/11 |
| Fa0/12 |
|  Gi0/1 |
|  Gi0/2 |
|  Null0 |
|  Vlan1 |

#2

Why you need + 0 ?? Simply remove it and it will work.

为什么你需要+ 0?只需将其移除即可。

SELECT port FROM interfaces ORDER BY RIGHT(port, 2)

SQL Fiddle Demo

SQL小提琴演示

Output:

PORT
------------
Fa0/1
Gi0/1
Gi0/2
Fa0/2
Fa0/3
Fa0/4
Fa0/5
Fa0/6
Fa0/7
Fa0/8
Fa0/9
Fa0/10
Fa0/11
Fa0/12
Null0
Vlan1

#3

The order is correct - lexicographically.

订单是正确的 - 按字典顺序排列。

You need to convert them to a number.

您需要将它们转换为数字。

#4

UPDATED

You need to do + 0 after extracting last two chars to convert it into number

在提取最后两个字符后,您需要执行+ 0将其转换为数字

SELECT inft.port FROM interfaces AS intf ORDER BY SUBSTRING(intf.port, LOCATE('/', intf.port)+1, LENGTH(intf.port)) + 0

#1