CREATE TABLE [dbo].[obj](
    [obj_id] [int] PRIMARY KEY CLUSTERED ,
    [obj_name] [nvarchar](20))



CREATE TABLE [dbo].[obj_fields](
    [fie_id] [int] NULL,
    [fie_name] [nvarchar](20) NULL,
    [ref_obj_id] [int] NULL
)


ALTER TABLE [dbo].[obj_fields]  WITH CHECK ADD  CONSTRAINT [FK_obj_fields_obj] FOREIGN KEY([ref_obj_id]) REFERENCES [dbo].[obj] ([obj_id])