SQL use comma-separated values with IN clause - asp.net

Question

I am developing an ASP.NET application and passing a string value like "1,2,3,4" into a procedure to select those values which are IN (1,2,3,4) but its saying "Conversion failed when converting the varchar value '1,2,3,4' to data type int."
Here is the aspx code:
private void fillRoles()
{
/*Read in User Profile Data from database */
Database db = DatabaseFactory.CreateDatabase();
DbCommand cmd = db.GetStoredProcCommand("sp_getUserRoles");
db.AddInParameter(cmd, "#pGroupIDs", System.Data.DbType.String);
db.SetParameterValue(cmd, "#pGroupIDs", "1,2,3,4");
IDataReader reader = db.ExecuteReader(cmd);
DropDownListRole.DataTextField = "Group";
DropDownListRole.DataValueField = "ID";
while (reader.Read())
{
DropDownListRole.Items.Add((new ListItem(reader[1].ToString(), reader[0].ToString())));
}
reader.Close();
}
Here is my procedure:
CREATE Procedure [dbo].[sp_getUserRoles](#pGroupIDs varchar(50))
AS BEGIN
SELECT * FROM CheckList_Groups Where id in (#pGroupIDs)
END

Answer 1

Here is a workaround I found to do what you are trying to achieve
CREATE Procedure [dbo].[sp_getUserRoles](
#pGroupIDs varchar(50)
)
As
BEGIN
SELECT * FROM CheckList_Groups Where (',' + #pGroupIDs +',' LIKE '%,' + CONVERT(VARCHAR, id) + ',%')
End
This gets your comma delimited list and compares it to the id's(which are represented like so ',1,', ',2,' etc) in the table using LIKE

Answer 2

If you dont want to use dynamic sql, the best way ive found is to create a function which turns a delimited string into a table, something like this works for an Integer list:
CREATE FUNCTION [dbo].[StringToIntList]
(#str VARCHAR (MAX), #delimeter CHAR (1))
RETURNS
#result TABLE (
[ID] INT NULL)
AS
BEGIN
DECLARE #x XML
SET #x = '<t>' + REPLACE(#str, #delimeter, '</t><t>') + '</t>'
INSERT INTO #result
SELECT DISTINCT x.i.value('.', 'int') AS token
FROM #x.nodes('//t') x(i)
ORDER BY 1
RETURN
END
Then use that in your sp:
CREATE Procedure [dbo].[sp_getUserRoles](
#pGroupIDs varchar(50)
)
As
BEGIN
SELECT * FROM CheckList_Groups Where id in (
SELECT ID FROM dbo.StringToIntList(#pGroupIds,',')
)
End

Answer 3

Sure it can't do that,
The generated query would be sth like this
SELECT * FROM CheckList_Groups Where id in ('1,2,3,4')
and sure it can't be executed.
you can build the query in your stored procedure then execute it with exec
'SELECT * FROM CheckList_Groups Where id in (' + #pGroupIDs + ')'
or
SELECT * FROM CheckList_Groups Where charindex(','+id+',' , #pGroupIDs)>0
but you first must add the ',' to start and end of your parameter in your c# code

Answer 4

It is not possible to put those values (the comma separated string) in a parameter-value.
What you'll have to do, is to create the SQL Statement in your stored procedure dynamically, by string concatenation. You'll have to execute it with the sp_executesql stored procedure then.
CREATE PROCEDURE [dbo].[getUserRoles]( #groupIds NVARCHAR(50) )
AS BEGIN
DECLARE #statement NVARCHAR(255)
SELECT #statement = N'SELECT * FROM CheckList_Groups Where id in ( ' + #pGroupIDs + N')'
execute sp_executesql #statement
END
Also, not that I named the SP getUserRoles instead of sp_getUserRoles.
The reason is very simple: when you execute a stored procedure whose name starts with sp_, then SQL Server will first query the master database to find that stored procedure, which causes a performance hit offcourse.

Answer 5

The way you are trying to do this is slightly wrong. You will need to use EXECUTE in order to achieve this.
CREATE PROCEDURE [dbo].[sp_getUserRoles](#pGroupIDs nvarchar(50))
As
BEGIN
EXECUTE (N'SELECT * FROM CheckList_Groups Where id in (' + #pGroupIDs + ')';
END

Answer 6

DECLARE #TagId NVARCHAR(100) = '43,81'
SELECT * FROM TABLE WHERE TagId IN (SELECT TRIM(VALUE) FROM STRING_SPLIT( #TagId , ',' ) )
USE STRING_SPLIT FUNCTION FOR THIS

Answer 7

You need to use SP_executesql to achieve this functionllity
CREATE Procedure [dbo].[sp_getUserRoles](
#pGroupIDs varchar(50)
)
As
BEGIN
EXECUTE sp_executesql
N'SELECT * FROM CheckList_Groups Where id in (#pGroupIDs)',
N'#level varchar(50)',
#level = #pGroupIDs;
End

Answer 8

The IN clause can't take a bound parameter like that. What it's being given when the query is actually created is SELECT * FROM CheckList_Groups Where id in ('1,2,3,4'). Essentially the IN clause is being passed a single string.

Answer 9

First create function -
Just run this code
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION [dbo].[CSVToTable] (#InStr VARCHAR(MAX))
RETURNS #TempTab TABLE
(id int not null)
AS
BEGIN
;-- Ensure input ends with comma
SET #InStr = REPLACE(#InStr + ',', ',,', ',')
DECLARE #SP INT
DECLARE #VALUE VARCHAR(1000)
WHILE PATINDEX('%,%', #INSTR ) <> 0
BEGIN
SELECT #SP = PATINDEX('%,%',#INSTR)
SELECT #VALUE = LEFT(#INSTR , #SP - 1)
SELECT #INSTR = STUFF(#INSTR, 1, #SP, '')
INSERT INTO #TempTab(id) VALUES (#VALUE)
END
RETURN
END
GO
Then -
Use function in bracket with select statment -
DECLARE #LIST VARCHAR(200)
SET #LIST = '1,3'
SELECT Id, Descr FROM CSVDemo WHERE Id IN (SELECT * FROM dbo.CSVToTable(#LIST))