MySQL - sort by certain last string character - mysql

Question

I'm trying to sort by a certain character on a string, for example,
before:
+----+---------+
| id | name |
+----+---------+
| 1 | red |
| 2 | red-a |
| 3 | red-xy |
| 4 | blue |
| 5 | blue-a |
| 6 | blue-xy |
+----+---------+
after:
+----+---------+
| id | name |
+----+---------+
| 4 | blue |
| 1 | red |
| 5 | blue-a |
| 2 | red-a |
| 6 | blue-xy |
| 3 | red-xy |
+----+---------+
are there any ways to categorize based on -a or -xy using ORDER BY
Thank you in advance.

Answer 1

SELECT
CASE
WHEN RIGHT(`name`,LENGTH(`name`)-INSTR(`name`,'-')) = `name` THEN ''
ELSE RIGHT(`name`,LENGTH(`name`)-INSTR(`name`,'-'))
END AS `suffix`,
`name`
FROM
`table1`
ORDER BY
`suffix`, `name`
If no suffix is found, it will put the record in the first row set.
Caveat: the first dash is used to separate the word from the prefix.

Answer 2

This will do what you're looking for. Wouldn't like to promise great performance if you had a lot of rows though:
select id, name from
(
select id,
name,
if (substring_index(name,'-', -1) = name, '', substring_index(name,'-', -1)) as grouping
from Table1
order by grouping, name
) as subTable
SQLFiddle here
[EDIT] Actually, that can be simplified to a single select with :
select id,
name
from Table1
order by if (substring_index(name,'-', -1) = name, '', substring_index(name,'-', -1)), name

Answer 3

These queries are more readable and this is probably the easiest way to sort on a suffix
SELECT
*
, IF (LOCATE('-', name) = 0
, 0
, LENGTH(SUBSTRING_INDEX(name, '-', -1))
)
suffix_length
FROM
Table1
ORDER BY
suffix_length
;
SELECT
*
FROM
Table1
ORDER BY
IF (LOCATE('-', name) = 0
, 0
, LENGTH(SUBSTRING_INDEX(name, '-', -1))
)
;
See demo http://sqlfiddle.com/#!9/92b63/41