You would have to do another Update statement. You can only change 1 table at a time in an update statement. You could still use the 2 table joins, but it would have to be in a separate statement.
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Question
Update Statement
Hi,
Here is my update statement:
Update Models
SET ModelNum = '123-TSTMODEL',
ModelDesc = 'GEN. ELEC. MODEL'
FROM Models a
left join companies b on a.ModelManfID = b.CompanyID
WHERE a.ModelID = 252767
My question is if I have b.CompName that need to be updated based on the two table
relationship and the ModelID.
How can I update the b.CompName to be included with my above SQL statement.
Thanks,
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Answers
SET XACT_ABORT ON -- rollback transaction on any error
BEGIN TRAN
Update Models
SET ModelNum = '123-TSTMODEL',
ModelDesc = 'GEN. ELEC. MODEL'
FROM Models a
left join companies b on a.ModelManfID = b.CompanyID
WHERE a.ModelID = 252767
UPDATE c
SET c.CompanyName = 'My name'
FROM companies c
JOIN models a a.ModelManfID = c.CompanyID
WHERE a.ModelID = 252767 -- update all companies with modelManfId = 252767
COMMIT TRAN
PS. You don't need to join models here because you can make WHERE clause based only on companies fields (ModelManfID). If you have to filter by some fields in models table, the join would be usefull here.
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by: maradamPosted on 2008-01-24 at 06:56:55ID: 20733510
You just can't update two or more tables within one update statement. You need to write another one. All you can do to maintaing business integrity is to include both statements in a transaction.