Question

TBL COL NAME                DATATYPE        ALLOW NULL

Subscriber_ID               int         Unchecked
Subscriber_Initial          varchar(5)  Unchecked
Subscriber_Name             varchar(50) Unchecked
Subscriber_Email            varchar(50) Unchecked
Subscriber_Group            varchar(20) Unchecked
Subscriber_Date             datetime    Unchecked
Subscriver_Active           bit         Unchecked
Subscriver_ActivateDate     datetime    Unchecked
Subscriver_DeactivateDate   datetime    Checked

Now When the user signed up, i need to check whether he’s already existed in the table.

If not, Create a new record.

If so, check whether the user is active.

If not, activate it. update the activate date.

If so, return he’s already signed up.

INSERT INTO 
[ZCustom_SubscriberList] 
(Subscriber_Initial,Subscriber_Name,Subscriber_Email,Subscriber_Group,Subscriber_Date) 
select @initial,@name,@email,'A1',@subdate 
WHERE NOT EXISTS (SELECT * FROM [ZCustom_SubscriberList] WHERE Subscriber_Email=@email)

This is my code and it is working fine without Active column. I am wondering how to add in the activate part.

Answer 1

Something like this should work: (Disclaimer: this is untested code, but you should get the general idea)

create procedure AddUser
    @NewUserName varchar(50)
as

    set nocount on;

    declare @SubscriberActive bit

    if exists
    (
        select *
        from YourUserTable
        where subscriber_name = @NewUserName
    )
    begin
        select @SubscriberActive = subscriber_active
        from YourUserTable
        where subscriber_name = @NewUserName

        if @SubscriberActive = 0
        begin
            update YourUserTable
            set subscriber_active = 1,
                subscriber_activedate = getdate()
            where subscriber_name = @NewUserName
        end
    end
    else
    begin
        insert into YourUserTable(subscriber_name) -- fill in the rest of your not null fields
        values(@NewUserName)
    end
go