Jan 27, 2017 · It's quite possible that the data is actually an empty string instead of null. You could use the following to cover for that: Here is another way to tackle this. You can use > '' instead of all those IS NULL and such.

You should be able to accomplish this with the statement below. isnull(nullif(isnull(ID,'Y'),ID),'N')

Feb 1, 2012 · You need CASE WHEN x IS NULL THEN instead... 'Declare @Doc' + COLUMN_NAME + ' ' + DATA_TYPE. + CASE WHEN (CHARACTER_MAXIMUM_LENGTH) IS Null then ' ' else '(' convert(varchar(12),CHARACTER_MAXIMUM_LENGTH) + ')' end . INFORMATION_SCHEMA.COLUMNS . TABLE_NAME = 'Documentos' + COLUMN_NAME + ' '

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.

Aug 1, 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.

Aug 2, 2013 · I'd like to know a correct way of using the query below in a case statement: and it.bitIsAsset = Case it.bitIsAsset When 1 Then it.intItemId IS NOT NULL Else 'All' End --it ia as Alias...

If no conditions are true, it returns the value in the ELSE clause. If there is no ELSE part and no conditions are true, it returns NULL. Below is a selection from the "OrderDetails" table in the Northwind sample database: The following SQL goes through conditions and returns a value when the first condition is met:

Mar 26, 2025 · Learn how to use the SQL `CASE` statement to implement conditional logic efficiently. Explore its syntax, use cases, best practices, and performance considerations.

By using CASE statements, complex conditional branching can be implemented within SQL queries. To specify NULL values as conditions, use IS NULL in the condition expression. It is important to distinguish NULL values as they indicate the absence of specific data.

Jan 21, 2008 · I want to know how to detect for NULL in a CASE statement. I know logically I can exclude the 'when null...' line as it will be captured by the ELSE statement.