參數不起作用存儲過程

Question

-- This query works using the split function 
SELECT AssignUserID,* FROM dbo.Task WHERE TaskID in (SELECT * FROM udf_Split ('1269469,1359508',',')) 


--this script using the @TasksToUpdate parameter does not work. 
--If I replace the parameter @TasksToUpdate with the string in the where clause then it does work 
DECLARE @NewUser varchar 
DECLARE @TasksToUpdate varchar 
DECLARE @UpdateUser VARCHAR(30) 

SET @NewUser = 'aaronteamlead' 
SET @TasksToUpdate = '1269469,1359508' 
SET @UpdateUser = 'updateusername' 

UPDATE dbo.Task 
SET AssignUserID = @NewUser,LastUpdatedDt=getdate(),LastUpdatedUser=@UpdateUser 
WHERE TaskID in (SELECT * FROM udf_Split (@TasksToUpdate,',')) 

Answer 1

DMason是正確的。

「指定DECLARE @TasksToUpdate VARCHAR的長度。當未指定長度，則默認爲VARCHAR（1）」。