maria-discuss team mailing list archive

[Justin Swanhart <greenlion@xxxxxxxxx>]

Hi,

select max(plus) from (select max(t1.c1) plus from t1 join (Select * from
t1) z) z;
+-----------+
| max(plus) |
+-----------+
|       235 |
+-----------+
1 row in set (0.00 sec)


On Tue, Jun 23, 2015 at 6:21 AM, Justin Swanhart <greenlion@xxxxxxxxx>
wrote:

> Hi,
>
> You can't use a temp table more than once in a query.
>
> If you could not use table more than once you could not do self join, or
> variety of other things:
> select * from a A1 join a A2 on A1.child_id A2.id;
>
> --Justin
>
> On Tue, Jun 23, 2015 at 12:17 AM, Benoit Panizzon <benoit.panizzon@xxxxxx>
> wrote:
>
>> Hi Kristian
>>
>> > Maybe try something like this (untested):
>> >
>> > SELECT *
>> >   FROM (SELECT mail_out_anon+mail_out_auth ss, timeslice
>> >           FROM domaincounters
>> >          WHERE domain_id=19
>> >          ORDER BY timeslice desc
>> >          LIMIT 24) tmp
>> >  ORDER BY ss DESC
>> >  LIMIT 1;
>>
>> Thank you, that is the solution I was looking for.
>>
>> Justin, you cannot have a subquery on the same table within your query. My
>> previous attempt was to return the ID's of the last 24 timeslices in a
>> subquery and then MAX() them. But MariaDB prevents this kind of query.
>>
>> Mit freundlichen Grüssen
>>
>> Benoit Panizzon
>> --
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>
>