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joining multiple databases in one Sr...

  • June 25, 2013 at 10:25 pm

    #275594

    hi guys

    I need help with an issue that I've got

    scenario

    I have multiple branches around australia with each branch having it's own db

    each db contains the same information required for the branch itself

    e.g.

    branch a Has first name / last name

    branch b has first name / last name

    of course the fields have their own unique entries

    e.g.

    James in branch a

    John in branch b

    objective

    creation of report in ssrs with a join of multiple databases

    is it possible using an expression or anything else at all

    thanks in advance to who ever can help me

  • June 26, 2013 at 8:26 am

    #1627586

    If the databases are on the same server you can do this by using the full naming convention.

    [database].[schema].[object]

    If they are on different servers you will need to setup link servers and use 4 part naming.

    [linkserver].[database].[schema].[object]

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  • June 26, 2013 at 8:29 am

    #1627591

    you'll run into permissions problems accessing, say 10 databases in a single query;

    the calling user would need at least read permissions in every single database for the specific table(s) involved..

    i think you'll need to create a procedure, featuring EXECUTE AS with a user that has read permissions in all those databases, and then grant execute to that procedure to the groups that contain the users that will be using this report.

    even better would be using a certificate, which i have no experience doing, but is the preferred way for permissions issues like this, i think.

    --the EXECUTE AS must be a user in the database(s)...not a login

    CREATE procedure pr_CallBoostedSecurityProcess

    WITH EXECUTE AS 'superman'

    AS

    BEGIN

    SELECT ColumnList FROM db1.dbo.Table1 UNION ALL

    SELECT ColumnList FROM db2.dbo.Table1 UNION ALL

    SELECT ColumnList FROM db3.dbo.Table1 UNION ALL

    SELECT ColumnList FROM db4.dbo.Table1

    END

    Lowell

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  • June 26, 2013 at 2:54 pm

    #1627739

    so it can be done...

    I am getting a lot of people saying in Ssrs you can't connect more then one database per report

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