Stephane,
SELECT table1.recordname, table1.value - table2.value
FROM table1, table2
WHERE table1.recordname = table2.recordname
Right?
--------------------------
David Olbersen
iGuard Engineer
11415 West Bernardo Court
San Diego, CA 92127
1-858-676-2277 x2152
> -----Original Message-----
> From: Stephane [mailto:sylfanie@club-internet.fr]
> Sent: Friday, April 04, 2003 12:06 PM
> To: pgsql-sql@postgresql.org
> Subject: [SQL] Difficult query (for me)
>
>
> Hello,
>
> Basicaly I have two tables like this:
>
> Table 1
> RecordName Value
> a 100
> b 100
> c 100
> d 100
> e 100
> f 100
>
> Table 2
> RecordName Value
> a 25
> b 50
> c 75
> g 150
> h 150
>
> I would like a query that give me a result like this:
> a 75 (100-25)
> b 50 (100-50)
> c 25
> d 100
> e 100
> f 100
> g -150
> h -150
>
> It is table1-table2.
> I could do it for records a,b,c but I do not how to have record which
> are only in one of the two tables.
> Thanks for your help.
> Stephane.
>
>
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