HOW TO SELECT ONLY THOSE RECORDS WHERE NOT AVAILABLE ON SECOND TABLE

Question

hi
i have two tables one name is menus and second name is UGroupDetail. Actually i have created it for user role privileges for my application
USE [LedgerDB]
GO
/****** Object: Table [dbo].[Menus] Script Date: 03/28/2015 13:45:27 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[Menus](
[RightID] [int] NOT NULL,
[RightName] [nvarchar](200) NULL,
[GroupID] [int] NULL,
CONSTRAINT [PK_Menus] PRIMARY KEY CLUSTERED
[RightID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
second table is
USE [LedgerDB]
GO
/****** Object: Table [dbo].[UGroupDetail] Script Date: 03/28/2015 13:46:12 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[UGroupDetail](
[RightID] [int] NOT NULL,
[RightName] [nvarchar](200) NULL,
[GroupID] [int] NULL
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[UGroupDetail] WITH CHECK ADD CONSTRAINT [FK_UGroupDetail_Menus] FOREIGN KEY([RightID])
REFERENCES [dbo].[Menus] ([RightID])
ON UPDATE CASCADE
ON DELETE CASCADE
GO
ALTER TABLE [dbo].[UGroupDetail] CHECK CONSTRAINT [FK_UGroupDetail_Menus]
GO
ALTER TABLE [dbo].[UGroupDetail] WITH CHECK ADD CONSTRAINT [FK_UGroupDetail_UserGroup] FOREIGN KEY([GroupID])
REFERENCES [dbo].[UserGroup] ([GroupID])
ON UPDATE CASCADE
ON DELETE CASCADE
GO
ALTER TABLE [dbo].[UGroupDetail] CHECK CONSTRAINT [FK_UGroupDetail_UserGroup]
UGroupDetail have many groups as assigned to a new user but Menus table has only default groups which is 90 records
Menus table is a primary table and UGroupDetail is a Foreign key table
now i want to combined these tables and want to get only remaining records for each group
for example i have assigned 5 roles to GroupID 2 and now when i apply select commands the result should be 85 out 90 for GroupID 2
but i have not idea how to modify select query for get desired result

Answer 1

I don't really understand the tables. What is GroupID doing in the Menues table? And what does an entry without a RightName mean? Shouldn't that column be NOT NULL?
The UGroupDetail does not have any primary key. From your description, I would expect the PK to be (RightID, GroupID). But strangely enough, GroupID is nullable. So is RightName, but I think this column is redundant and should be removed.
Anyway, if I understand your question correctly, you need something like:
SELECT UG.Name, M.RightName
FROM   UserGroups UG
CROSS  JOIN Menus M
WHERE  NOT EXISTS (SELECT *
                   FROM   UGroupDetail UGD
                   WHERE  UG.GroupID = UGD.GroupID
                     AND  UG.RightID = M.RightID)
Erland Sommarskog, SQL Server MVP, [email protected]