Create PROCEDURE my_sql
AS
    declare @id int,@loginname varchar(20),@website varchar(100)
    declare rs cursor for select top 50 id,loginname,website from union_user
    
    open rs
    fetch next from rs
    into @id,@loginname,@website
    while @@fetch_status=0
    begin
        print convert(varchar,@id) + ',' + convert(varchar,@loginname) + ',' + convert(varchar,@website)
        fetch next from rs
        into @id,@loginname,@website
    end
    close rs

    deallocate rs
GO