select where t1.a = t2.a or t1.a = alternate t2.a

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October 19th, 2004, 06:38 PM

nara_fugu

Registered User

Join Date: Oct 2004

Posts: 1

Time spent in forums: < 1 sec
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select where t1.a = t2.a or t1.a = alternate t2.a

hopefully my title makes sense to people, but what i have is two tables (below is just an example not even close to real data)

t1
------
file type
----- ------
FILE1 M
FILE2 M
FILE3 F

t2
------
server type available
----- ---- -----------
SER1 M true
SER2 F false
SER3 M true

i want to
select t1.file from t1,t2 where (at least one of the appropriate server type t2.available=true)

so that only FILE1 and FILE2 are selected because SER2 is not available. but if SER2 were available, then all three in t1 would be selected. and if SER1 & SER3 were not available, no type M file would be returned

hope this is clear.

December 4th, 2004, 11:25 AM

Madpawn

My beat is correct.

Join Date: Dec 2004

Posts: 339

Time spent in forums: 2 Days 22 h 3 m 33 sec
Reputation Power: 4

Try something like

Code:

SELECT
 t1.file
FROM
 t1
INNER JOIN
 t2
ON
 t1.type = t2.type
WHERE
 t2.available = 'true'
AND
 t1.type = 'M'

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