Re: Getting the count(*) from two tables and two date ranges in same query

Hi Adam and all,

I don't get it=). How do I input the second daterange in this query?
Also, I have the ID from table1. Its known in the query.

Wouldn't I need to use a UNION for this kind of query?

Håkan Jacobsson - System Developer
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-----Ursprungligt meddelande-----
Från: Adam Rich [mailto:adam.r@sbcglobal.net]
Skickat: den 28 januari 2008 15:22
Till: Håkan Jacobsson; pgsql-general@postgresql.org
Ämne: RE: [GENERAL] Getting the count(*) from two tables and two date ranges in same query

> Resulting in 4 columns in the ResultSet like:
>
> count(*)_from_table2_between_fromdate1_and_todate1  = X
> count(*)_from_table2_between_fromdate2_and_todate2  = Y
> count(*)_from_table3_between_fromdate1_and_todate1 = Z
> count(*)_from_table3_between_fromdate2_and_todate2  = V
>
> Is this possible?


Select t1.id,
sum(case when t2.date between d1 and d2 then 1 else 0 end) as sum1,
sum(case when t3.date between d1 and d2 then 1 else 0 end) as sum2
from t1, t2, t3
where t1.id=t2.id and t2.id = t3.id
group by t1.id