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Posted by Steve on 09/15/05 13:27
Yes, I meant that I tried to create a temporary table, not db, sorry...
Regarding the 3 joins...would putting parenthesis around any of them
help?
How are they being processed exactly?
The first join has a single table reference immediately preceding the
join statement, but the others cannot (is that correct?)
What are the next two joins being joined to exacty (since there is no
table specified before the two join statements?
The tables that I'm joining look like this:
------FOLIO---------------STAY FOLIO-----------------STAY
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|___________GUEST
All transactions have FOLIO records, but not all transactions have STAY
FOLIO, STAY, OR GUEST records.
I need to return all transactions that have a folio record.
This is the syntax I'm using to accomplish this:
mydb.dbo.FOLIO FOLIO
LEFT OUTER JOIN
mydb.dbo.STAY_FOLIO STAY_FOLIO
ON
FOLIO.folio_id = STAY_FOLIO.folio_id
LEFT OUTER JOIN
mydb.dbo.STAY STAY
ON
STAY_FOLIO.stay_id = STAY.stay_id
LEFT OUTER JOIN
mydb.dbo.GUEST GUEST
ON
FOLIO.guest_id = GUEST.guest_id
I don't understand how the order of the joins affects their processing.
Is there a better way to phrase the joins, given the table
relationships as outlined above?
Thanks!
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