Re: sql having clause

[Carel <coteijgeler@xxxxxxxxx>]

You cannot have an ORDER BY in the CTE.


Op 17-4-2020 om 20:13 schreef Tom Hambel:
> One idea would be to wrap your statement in a CTE and compare that way.
>
> With temp(id,usage,useyear,usemonth) as
> (
> SELECT id, sum(metereduse), year(getdatesql(readdate)),
> month(getdatesql(readdate)) FROM dailyuse
> GROUP BY id, year(getdatesql(readdate)), month(getdatesql(readdate)) ORDER BY id, year(getdatesql(readdate)), month(getdatesql(readdate))
> )
> Select id,usage,useyear,usemonth
> from temp a
> Join temp b on a.id=b.id and
> (a.useyear=b.useyear and b.usemonth=a.usemonth+1 and a.usemonth<12
> Or a.usemonth=12 and b.usemonth=1 and b.useyear=a.useyear+1)
> where b.usage>=a.usage*1.5
>
> the join will depend on which you want to compare too.
>
> What we did to make these scenarios much easier is create a calendar table with all attributes of a date;  numeric, cymd,mdy,month,date,period, date fields etc.
> Then we just join to that and do our thing.
> With the date data type in the join file it makes date manipulation super easy.
>
>
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