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Query performance between 2 or 3 bases

  • August 20, 2010 at 6:19 am

    #225043

    Hello

    I wonder if it could have performance problem when writing a query between 2 or 3 differents bases

    ex :

    select *

    FROM db1.dbo.table inner join db2.dbo.table on id1=id2

    thanks

  • August 20, 2010 at 6:28 am

    #1209609

    As long as the databases are on the same instance, there's no performance difference between joining tables in 2 databases and joining 2 tables in the same database.

    Gail Shaw
    Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
    SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

    We walk in the dark places no others will enter
    We stand on the bridge and no one may pass

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