sql server - Can I declare a local variable not null? -


in t-sql, declare local variable use query so:

declare @var_last datetime; set @var_last = (select top(1) col_date tbl_dates order col_date);

in application i'm testing, error query return null, , it's desirable query return crash error if were.

i'd set @var_last not null syntax...

declare @var_last datetime not null;

...is invalid. can write simple check on return of query see if it's null, , error if is, question is, not possible declare local variable not null?

that's right, according documentation declare @local_variable, available at: http://technet.microsoft.com/en-us/library/ms188927.aspx, doesn't accept null | not null parameter -- valid column definitions.

if want stop execution if return null, test null and, if is, raiserror; see: http://technet.microsoft.com/en-us/library/ms178592.aspx.


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