max date and A<> B values queries joined 3 tables

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max date and A<> B values queries joined 3 tables

Author

Topic

fredong
Yak Posting Veteran

80 Posts

Posted - 2006-07-13 : 15:44:57

I have 3 tables named RBL, s_RAB, RAB that I need to get the s_RABID.TAGID and RAB.TAGID values that has the MAX s_RAB.ChangedDate that is smaller than the RBL.ChangedDate and has s_RABID.TAGID <> RAB.TAGID. Below is my example. Please advise. Thanks.

s_RAB Table
-----------

RABID TAGID ChangedDate
1111 0011 01/01/06
1111 0033 01/02/06 --> I need to get this value
1111 0066 01/04/06

RAB Table
-----------

RABID TAGID ChangedDate
1111 0044 01/03/06 --> and this value
1112 0033 01/05/06

RBL Table
-----------

RABID ChangedDate
1111 01/03/06
1112 01/05/06

Below is my script and I am not getting any value back.

SELECT
s_RAB.RABID,
RBL.ItemType,
s_RAB.ChangedDate,
s_RAB.TAGID,
RAB.TAGID
FROM RBL, s_RAB, RAB
WHERE s_RAB.RABID = RBL. RABID
AND s_RAB.RABID = RAB.RABID
AND s_RAB.ChangedDate
IN (SELECT MAX(s_RAB.ChangedDate) FROM s_RAB WHERE s_RAB.RABID = RBL.RABID)
AND s_RAB.ChangedDate < RBL.BALChangedDate
AND s_RAB.TAGID <> RAB.TAGID
AND RBL.ItemType ='R'

k

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2006-07-13 : 16:32:03

You are missing the ItemType in your table definitions. Also you have renamed changeddate to balchangeddate in the query.

With the expected sample data above, what is your complete expected output?

Peter Larsson
Helsingborg, Sweden

fredong
Yak Posting Veteran

80 Posts

Posted - 2006-07-13 : 18:50:33

itemtype is in the table I forgot to add on it and they are all itemtype 'R'

k

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