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26 lip 2013 · You need to select one type or the other for the field, the field type can't vary by row. The simplest is to remove the ELSE '-' and let it implicitly get the value NULL instead for the second case.
15 mar 2013 · NULL does not equal anything. The case statement is basically saying when the value = NULL .. it will never hit. There are also several system stored procedures that are written incorrectly with your syntax. See sp_addpullsubscription_agent and sp_who2.
11 lip 2012 · I'm not familiar with MSSQL but if it has something like IF-function in MySQL, you can write such code: IF(ID IS NULL, 'YES', 'NO') AS ID_Value –
1 sie 2017 · I have a WHERE clause that I want to use a CASE expression in. However, my CASE expression needs to check if a field IS NULL. If the @UserRole variable value = 'Analyst', then the SupervisorApprovedBy column value must be NULL. Otherwise, I am saying return all data i.e. SupervisorApprovedBy = SupervisorApprovedBy.
3 wrz 2024 · If no input_expression = when_expression evaluates to TRUE, the SQL Server Database Engine returns the else_result_expression if an ELSE clause is specified, or a NULL value if no ELSE clause is specified.
I thought I wrote my case statement correctly, giving me a number between 1-10 only and upon testing just that specific select statement over 1000 tries, I always get a random number between 1-10, nothing larger or smaller. Can anyone help me to understand why this code tries to enter a NULL value into that column?
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.
