problem in creating store procedure

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i want to implement two queries using store procedure

first i want to use count query to check wheather the product already exits or not. then if the product doesn't exit. then i want to insert a data. other wise throw an error that record already exits.

i want to implement such kind of thing in storeprocedure.. but don't know how to do..

C#

query= Select Count * from ShoppingCart where Productid='"+@productid+"'

int count= obj.ohh(query)
if(Count>)

{
Response.Redirect("Error Page.aspx")

}
else

INSERT INTO SHOPPINGCART
	(CUSTOMERID,PRODUCTID,QUANTITY) 
	VALUES(@CustomerID,@ProductID,@Quantity

)

Posted 23-Sep-11 9:47am

codegeekalpha

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3 solutions

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Deepthi Aravind · Accepted Answer · 2011-09-23T19:31:00

Solution 3

CREATE PROCEDURE [PROCEDURENAME]
@PRODUCTID INT,
AS

DECLARE @COUNT INT,
SELECT @COUNT = SELECT * FROM SHOPPINGCART WHERE PRODUCTID=@PRODUCTID
IF(@COUNT>0)
RAISERROR('YOUR MSG', 16, 1)
ELSE
INSERT INTO SHOPPINGCART
(CUSTOMERID,PRODUCTID,QUANTITY)
VALUES(@CustomerID,@ProductID,@Quantity)

Posted 23-Sep-11 19:31pm

Deepthi Aravind

Comments

P.Salini 24-Sep-11 2:54am

I think in 1st query you need to specify count(*) instead of *

kris444 · Accepted Answer · 2011-09-23T17:10:00

Hi
You can simply do

SQL

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[AddToCart] 
	@CustomerID varchar(50),
	@ProductID int,
	@Quantity int
As
If Not Exists (Select 1 From table where ProductID = @ProductId)
 INSERT INTO ShoppingCart	(CustomerID,Quantity,ProductID) VALUES(@CustomerID,@Quantity,@ProductID)

#realJSOP · Accepted Answer · 2011-09-23T09:54:00

Solution 1

Something like this (probably needs tweaking):

C#

query = "declare count int;set count = select count (*) from table where blah=blah; if (count = 0) insert into table blah blah;"
SqlCommand cmd = new SqlCommand(query, conn);
int recsAffected = sqlCommand.ExecuteNonQuery();
if (recsAffected == 0)
{
    Response.Redirect("Errorpage.aspx");
}

Posted 23-Sep-11 9:54am

#realJSOP

Comments

codegeekalpha 23-Sep-11 16:07pm

i want to do it using store procedures..

codegeekalpha 23-Sep-11 16:14pm

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[AddToCart]
@CustomerID varchar(50),
@ProductID int,
@Quantity int,
@Count int
@Count=select count (*) from table where ProductID=@ProductID;
If(@Count==0)
AS
BEGIN
INSERT INTO ShoppingCart
(CustomerID,Quantity,ProductID)
VALUES(@CustomerID,@Quantity,@ProductID)
END

codegeekalpha 23-Sep-11 16:14pm

i wrote it like this but getting error

Rajesh Anuhya 23-Sep-11 23:23pm

can you give me what error you are getting??