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26 lip 2013 · In this situation you can use ISNULL() function instead of CASE expression . ISNULL(B.[STAT], C.[EVENT DATE]+10) AS [DATE]
The CASEexpression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSEclause.
11 lip 2012 · You should be able to accomplish this with the statement below. isnull(nullif(isnull(ID,'Y'),ID),'N') –
1 sie 2017 · You can check if a field or variable is equal to NULL because all comparisons to NULL return NULL (which in a CASE or IF predicate is taken as meaning false), so WHEN <FieldOrVariable> = NULL THEN <output> and WHEN <FieldOrVariable> <> NULL THEN <output> will never match.
17 maj 2013 · I settled on using the following approach: AND ((@BudgetFilter = 0 AND ISNULL(Project.Contribution, 0) >= 25000) OR (@BudgetFilter = 1 AND ISNULL(Project.Contribution, 0) < 25000) OR (@BudgetFilter = 2 AND ISNULL(Project.Contribution, 0) > 0))
27 sty 2017 · You can use either CASE structure to do this, but you can't call a function if you use the CASE fieldname WHEN approach, so you can either use CASE WHEN fieldname condition: SELECT Name, CASE WHEN color = 'black' THEN 'b'. WHEN color = 'red' THEN 'r'. WHEN color IS NULL THEN 'empty'.
This tutorial shows you how to use two forms of SQL CASE: simple CASE and searched CASE expressions to add the IF THEN ELSE logic to SQL statements.
