comparing username present in database or not

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SQL-Server-2005

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i have to compare with my database whether username is present or not,if present then inserting new username otherwise show a msg that username already exist. also tell me what i have to write in stored procedure.

Posted 29-Sep-11 19:44pm

chinta123

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Jayesh Goyani · Answer 1 · 2011-09-29T19:50:00

SQL

--Stored procedure

Declare @username varchar(max)
Declare @retuenValue int output

if not exists (select * from User where Username = @username)
Begin
 --insert statement here
 set  @retuenValue = scopidentity()
END
ELSE
BEGIN
 set  @retuenValue = 0
END

-- aspx.cs page
if returnvalue is zero then username is alraedy exists

devildx2050 · Answer 2 · 2011-09-29T20:07:00

create table :-

SQL

CREATE TABLE [dbo].[TBL_CATEGORY_MASTER](
    [pk_cat_id] [int] IDENTITY(1,1) NOT NULL,
    [category_name] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
    [is_active] [bit] NULL CONSTRAINT [DF_TBL_CATEGORY_MASTER_is_active]  DEFAULT ((1)),
 CONSTRAINT [PK_TBL_CATEGORY_MASTER] PRIMARY KEY CLUSTERED
(
    [pk_cat_id] ASC
)WITH (PAD_INDEX  = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]

GO
SET ANSI_PADDING OFF

then

create proc [dbo].[usp_Add_Category]
@pk_cat_id int,
@category_name varchar(50),
@active int
as
if exists(select 1 from TBL_CATEGORY_MASTER where category_name=@category_name AND pk_cat_id<>@pk_cat_id)
BEGIN
SELECT -1
end
ELSE if exists (select 1 from TBL_CATEGORY_MASTER where pk_cat_id=@pk_cat_id)
BEGIN
UPDATE TBL_CATEGORY_MASTER SET category_name=@category_name,is_active=@active WHERE pk_cat_id=@pk_cat_id
SELECT 0
end
ELSE if (@pk_cat_id=0)
BEGIN
INSERT INTO TBL_CATEGORY_MASTER VALUES (@category_name,@active)
select @@identity
END

if stored procedure return -1 then record already exists...
try this query :)
you will get all your answers

comparing username present in database or not

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