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15 mar 2013 · CASE LEN(ISNULL(last_Name,'')) WHEN 0 THEN '' ELSE ' ' + last_name END AS newlastName LEN(ISNULL(last_Name,'')) measures the number of characters in that column, which will be zero whether it's empty, or NULL, therefore WHEN 0 THEN will evaluate to true and return the '' as expected.
26 lip 2013 · In this situation you can use ISNULL() function instead of CASE expression . ISNULL(B.[STAT], C.[EVENT DATE]+10) AS [DATE]
11 lip 2012 · You should be able to accomplish this with the statement below. isnull(nullif(isnull(ID,'Y'),ID),'N') –
The SQL CASE Expression. 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.
30 kwi 2012 · Both columns are converted to VARCHAR(12), but COALESCE ignores the padding implicitly associated with concatenating a CHAR(10), while ISNULL obeys the specification for the first input and converts the empty string to a CHAR(10). The SQL Server COALESCE statement supports more than two arguments
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.
14 cze 2011 · I have a section of code that is part of a PROC, where the conditions being looked at is using a CASE statement, along with SUBSTRING conditions. The need that I have to account for is if a...
