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Editorial Team
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Asked: 2026-05-29T03:53:16+00:00

Is there an advantage of using Cross apply over case statements? For example as

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Is there an advantage of using Cross apply over case statements? For example as below I have a number of columns I need to do calculations on, is it inefficient to use cross apply to achieve this or is there no performance difference?

SELECT * from myTable
cross apply
(
  select test1 =
  CASE  
    WHEN Price <> '' AND Cost <> 0 and 
      Cast(Cost As float) <> -1 THEN Cost + Price                           
    WHEN Price <> '' AND Cost = 0 THEN bestPrice   
    WHEN Price <> '' AND Cost = -1 THEN CAST(Cost AS varchar(20))
  END 
) as test1  
cross apply
(
  select Handling = round(((Price * 1.2) + 2.5) / 0.85, 2)
) as Handling                              
WHERE (accuracy > 0 and Total <> -1)
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1 Answer

  1. Editorial Team

    There is no performance difference. You can verify this by looking at the execution plans of both variants.

    A cross-apply in this pattern is just a “Compute Scalar”. The query optimizer is smart about this.

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