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Editorial Team
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Asked: 2026-06-11T11:44:58+00:00

Someone has written the following stored proc query (I have removed all the irrelevant

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Someone has written the following stored proc query (I have removed all the irrelevant code to make things easier to read)

 SELECT           
   CRL.ClientNum ,    
            ..."A lot of columns"...,
   ISNULL((SELECT SUM(Amount) FROM db..History dh (nolock) WHERE dh.id = dd.Id AND ActivityId = 11), 0.00) AS [Some Amt],    
            ..."A lot more columns"...        
   FROM db..[SomeLog] SL  
            ..."A lot of inner joins and left joins"...             
   where clause
   order by clause

This all okay but, now I need to put in a Case statement to select/compare columns from The “db..History” table. The issue is there is no existing join on this table.

  • I have tried putting in an inner join on the “db..History” table but this returns a lot more rows than it should. Most likely because there are multiple “Histories” for the table its joining on.
  • I thought about using a temp table at the start to store the “db..History” table values but this required doing a lot of inner joins to get the data and would be performance hit.
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1 Answer

  1. Editorial Team

    Maybe your inner join isn’t correct, however, you can create a view of your necessary tables & fields and implement a join on that. in most situation using visual tools(shown in the above link) to create a view is easier and better than writing code.

    Most join problems are because of creating tables incorrectly. If you create tables distributed truly and clear, it can help you a lot.

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