How to use comma separated Ids as parameter in sql server?

just think to pass comma separated Id as a parameter or how to use comma delimited value as parameter and use that in SQL server, since there is no way to use parameter as an array so we can use string for multiple IDs or values but if it's integer then we cannot use it in IN clause in SQL Server even if it is string (varchar). So how to use multiple values or IDs as parameter and use that in IN clause. we see some tricks to use them and get our result as we want.

Let's first discuss the simplest way, suppose you want to get all the product in Products table where ProductId in (100, 101, 102, 110, 500, 600, 700, 800, 900, 1000) then

Declare @Ids Varchar(50) Set @Ids = ',100,101,102,110,500,600,700,800,900,1000,'

SELECT * FROM Products
WHERE Charindex(',' + CAST(ProductId  as Varchar)+ ',', @Ids) > 0

Note the "," at beginning and end in Ids, you can convert it into procedure and use comma separated string as parameter starting with comma as shown in example.

Other way is to use the dynamic query, convert entire query into string and finally use Exec (@string) to execute the query see this (no need to keep comma at begginig and end in ids)

CREATE PROCEDURE procedure_name
   @OrderList VARCHAR(1000)
AS   
Declare @SQL VARCHAR(1000)

SET @SQL = 'SELECT * FROM Products'
     + 'WHERE ProductId IN (' + @OrderList + ')'

Exec ( @SQL)    
GO

Third way is to create a function which can return all the IDs or values as a table, let's see function

CREATEFUNCTION [dbo].[SplitString]
 (@String varchar(8000), @Delimiter char(1))       
 returns @temptable TABLE (items varchar(100))       
 AS       
 BEGIN       
     DECLARE @idx int       
     DECLARE @slice varchar(8000)       

     Select @idx = 1       
         if len(@String)<1 or @String is null  return       

     while @idx!= 0       
     BEGIN       
         set @idx = charindex(@Delimiter,@String)       
         if @idx!=0       
             set @slice = left(@String,@idx - 1)       
         else       
             set @slice = @String       

         if(len(@slice)>0)  
             Insert into @temptable(Items) values(@slice)       

         set @String = right(@String,len(@String) - @idx)       
         if len(@String) = 0 break       
     END   
  return 
 END

Now use the above created function to get the ID and use them in IN clause

SELECT * 
FROM Products
WHERE  ProductID IN (SELECT Items FROM [dbo].[SplitString](@IDs, ','))

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