OPENQUERY UPDATE Syntax help needed

Hi All

I am updating a local table based on inner join between local table
and remote table.

Update LocalTable
SET Field1 = B.Field1
FROM LinkedServer.dbname.dbo.RemoteTable B
INNER JOIN LocalTable A
ON B.Field2 = A.Field2
AND B.Field3 = A.Field3

This query takes 18 minutes to run.
I am hoping to speed up the process by writing in OPENQUERY syntax.

Thanks
RS(rshivaraman@.gmail.com) writes:

Quote:

Originally Posted by

I am updating a local table based on inner join between local table
and remote table.
>
Update LocalTable
SET Field1 = B.Field1
FROM LinkedServer.dbname.dbo.RemoteTable B
INNER JOIN LocalTable A
ON B.Field2 = A.Field2
AND B.Field3 = A.Field3
>
This query takes 18 minutes to run.
I am hoping to speed up the process by writing in OPENQUERY syntax.

UPDATE LocalTable
SET Field1 = B.Field1
FROM OPENQUERY(LINKEDSERVER,
'SELECT Field1, Field2, Field3 FROM dbname.dbo.RemoteTable) B
INNER JOIN LocalTable A
ON B.Field2 = A.Field2
AND B.Field3 = A.Field3

I would not really expect this to perform better.

Distributed queries are always difficult, but it's difficult to suggest
anything without further knowledge about the table. How big are the
two tables?

--
Erland Sommarskog, SQL Server MVP, esquel@.sommarskog.se
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