Check If a Parameter Is Null or Empty in a Stored Procedure

Check if a parameter is null or empty in a stored procedure

I sometimes use NULLIF like so...

IF NULLIF(@PreviousStartDate, '') IS NULL

There's probably no reason it's better than the way suggested by @Oded and @bluefeet, just stylistic preference.

@danihp's method is really cool but my tired old brain wouldn't go to COALESCE when I'm thinking is null or empty :-)

How do check if a parameter is empty or null in Sql Server stored procedure in IF statement?

that is the right behavior.

if you set @item1 to a value the below expression will be true

IF (@item1 IS NOT NULL) OR (LEN(@item1) > 0)

Anyway in SQL Server there is not a such function but you can create your own:

CREATE FUNCTION dbo.IsNullOrEmpty(@x varchar(max)) returns bit as
BEGIN
IF @SomeVarcharParm IS NOT NULL AND LEN(@SomeVarcharParm) > 0
    RETURN 0
ELSE
    RETURN 1
END

how to check a parameter is null or empty in mysql?

You can try this

IF(NAME_OF_THE_VAR IS NULL) THEN  
    SIGNAL SQLSTATE '45000' 
    SET MESSAGE_TEXT = 'Order No not found in orders table'; 
END IF;

Stored procedure parameter check for not empty string

Use the LIKE operator for a pattern match.

'_%' matches a string with at least one character. It will exclude empty strings as well as nulls.

'%' would include empty strings but exclude nulls.

CREATE PROCEDURE usp_Test
    @IGLNO VARCHAR(10) = '_%'
AS
BEGIN
    SELECT * FROM TABLE WHERE IGLNO LIKE @IGLNO
END

Checking if UTD parameter has values in stored procedure

Use

IF EXISTS(SELECT * FROM @Words)

Not

IF @Words IS NOT NULL

The table valued parameter will always be present and can't be NULL like a scalar parameter.

If you call exec [dbo].[SearchByWord] without passing anything for the parameter the result is that @Words will be empty table.

Stored Procedure Check if Parameter is NULL

Your problem is not in your stored procedure. Your problem is that your calling application isn't passing the parameter in. You could default it to null if you want, like this:

ALTER  procedure [dbo].[sp_GetProductDetailsForMarket]
@marketid int = NULL

Or, you could just always pass it in, null or not.

Select all if parameter is null in stored procedure

There is no need to do AND (@serie_type IS NULL OR S.Type = @serie_type) as SQL Server has a built in function to do this logic for you.

Try this:

   .
   .
   AND  S.Type = isnull( @serie_type, S.Type)

This returns

true if @serie_type is null or the result of @serie_type = S.Type if @serie_type is not null.

From the MSDN:

IsNull Replaces NULL with the specified replacement value.

ISNULL ( check_expression , replacement_value )

The value of check_expression is returned if it is not NULL;
otherwise, replacement_value is returned after it is implicitly
converted to the type of check_expression, if the types are different.

Check for NULL or empty variable (MySQL stored procedure)

You can try like this:

IF(@previousTs IS NULL or @previousTs= '', '2017-00-04 00:00:01', @previousTs )

SQL ignore part of WHERE if parameter is null

How about something like

SELECT Id, col1, col2, col3, col4 
FROM    myTable 
WHERE   col1 LIKE @Param1+'%'
OR      @Param1 IS NULL

in this specific case you could have also used

SELECT Id, col1, col2, col3, col4 
FROM    myTable 
WHERE   col1 LIKE ISNULL(@Param1,'')+'%'

But in general you can try something like

SELECT Id, col1, col2, col3, col4 
FROM    myTable 
WHERE   (condition1 OR @Param1 IS NULL)
AND     (condition2 OR @Param2 IS NULL)
AND     (condition3 OR @Param3 IS NULL)
...
AND     (conditionN OR @ParamN IS NULL)

Return all results (including null) when SQL stored procedure parameter is null

I think it will work

SELECT * FROM myTable WHERE CODE = @devCode OR @devCode IS Null

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