ORDER BY "ENUM field" in MYSQL
MysqlSqlEnumsSql Order-ByMysql Problem Overview
There is a field 'noticeBy' enum('email','mobile','all','auto','nothing') NOT NULL DEFAULT 'auto'. As it known ordering by ENUM field performs relative to its index. However, how it possible make order by its values?
Mysql Solutions
Solution 1 - Mysql
As documented under Sorting:
> ENUM
values are sorted based on their index numbers, which depend on the order in which the enumeration members were listed in the column specification. For example, 'b'
sorts before 'a'
for ENUM('b', 'a')
. The empty string sorts before nonempty strings, and NULL
values sort before all other enumeration values.
>
> To prevent unexpected results when using the ORDER BY
clause on an ENUM
column, use one of these techniques:
>
> * Specify the ENUM
list in alphabetic order.
>
> * Make sure that the column is sorted lexically rather than by index number by coding ORDER BY CAST(col AS CHAR)
or ORDER BY CONCAT(col)
.
Per the second bullet, you can therefore sort on the column after it has been cast to a string:
ORDER BY CAST(noticeBy AS CHAR)
Solution 2 - Mysql
This also works:
ORDER BY FIELD(noticeBy, 'all','auto','email','mobile','nothing')
(I don't believe that there is a setting to achieve this, you have to provide the sort-values.)
Solution 3 - Mysql
You can define your order however you wish:
ORDER BY CASE noticeBy
WHEN 'email' THEN 1
WHEN 'mobile' THEN 2
WHEN 'all' THEN 3
WHEN 'auto' THEN 4
ELSE 5
END
This will return the rows in the following order: email, mobile, all, auto, nothing.
Solution 4 - Mysql
The best option to me:
ORDER BY FIELD(status, 'publish','not-publish','expirated','deleted'), creation DESC
Status is the field in my BBDD, and values in '' are the values that has in enum options.
I hope that help u too! :)
Solution 5 - Mysql
In my case, I had to sort enum results by the "ENUM" field and also make sure the values are in DESCENDING order. My enum had the following values: 'Open','Closed'
So when I used ORDER BY CAST(status AS CHAR)
, the results were in this order:
Closed
Open
Open
But I wanted the Open
status tickets to be shown first and then the Closed
tickets. So I used the following:
ORDER BY CAST(status AS CHAR) DESC
This gave me the order that I was looking for i.e.
Open
Open
Closed
Summary:
Just using ORDER BY CAST
on an enum did not seem to help. To sort the results in a specific order, mentioning ASC
or DESC
as well, did the trick.