How do I sort by desc in a subquery PHP MYSQL

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Hi, I want to get the last(highest) ID of every User_ID, my code works fine but I also want to order it by descending

ID User_ID
1 150
2 150
3 151
4 151

PHP

$result = $this->link->query("SELECT * FROM tickets WHERE ID IN (SELECT MAX(ID) FROM tickets WHERE Type=0 GROUP BY User_ID)");

top query gives me:
ID User_ID
2 150
4 151

and here is what I want:

ID User_ID
4 151
2 150

When I add ORDER BY ID DESC, it should give me 3,2,1 for example, but it gives me 1,2,3 by default.

PHP

$result = $this->link->query("SELECT * FROM tickets WHERE ID IN (SELECT MAX(ID) FROM tickets WHERE Type=0 GROUP BY User_ID ORDER BY ID DESC)");

I'd be very happy if you help me :D I was searching the internet about 10 hours and I couldn't find any solution.

Thanks.

Posted 13-Apr-15 16:48pm

m.rashidi

Updated 13-Apr-15 17:01pm

v2

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3 solutions

Solution 2

No need to do subquery. Try this-

PHP

$result = $this->link->query("SELECT MAX(ID) AS ID,User_ID FROM tickets WHERE Type=0 GROUP BY User_ID ORDER BY ID DESC)");

This should do your job.
Hope, it helps :)

Posted 13-Apr-15 17:23pm

Suvendu Shekhar Giri

Solution 3

Not sure if I understood the requirement correctly but based on your example if you want user id 151 before 150 then you should have two sorting columns. Something like:

PHP

$result = $this->link->query("SELECT * FROM tickets WHERE ID IN (SELECT MAX(ID) FROM tickets WHERE Type=0 GROUP BY User_ID)  ORDER BY USER_ID DESC, ID DESC");

Also check that you don't sort the data somewhere in the code after getting it from the database.

Posted 13-Apr-15 17:40pm

Wendelius

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Abhinav S · Accepted Answer · 2015-04-13T17:12:00

Solution 1

You have used order by on the inner query.
Change the location of the closing bracket - try SELECT * FROM tickets WHERE ID IN (SELECT MAX(ID) FROM tickets WHERE Type=0 GROUP BY User_ID) ORDER BY ID DESC

Posted 13-Apr-15 17:12pm

Abhinav S

v2

Comments

[no name] 13-Apr-15 23:15pm

Dear Abhinav S, I've already done that, but same result...

[no name] 13-Apr-15 23:21pm

The problem caused because of DataTable, thnaks