I am using SQL Server 2008 and SQL Server Management Studio to run queries to tables in a database.
I am attempting to alter an existing table that contains a foreign key. I need to add some columns and remove others but not make any changes to either the primary or foriegn key. I am running the following query and gettign the errors (after the query):
USE [EXTEND_D]
GO
IF EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id = OBJECT_ID(N'[dbo].[FK__Participa__FK_Pr__40F9A68C]') AND parent_object_id = OBJECT_ID(N'[dbo].[Participants]'))
ALTER TABLE [dbo].[Participants] DROP CONSTRAINT [FK__Participa__FK_Pr__40F9A68C]
GO
IF EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id = OBJECT_ID(N'[dbo].[FK__Participa__FK_Pr__41EDCAC5]') AND parent_object_id = OBJECT_ID(N'[dbo].[Participants]'))
ALTER TABLE [dbo].[Participants] DROP CONSTRAINT [FK__Participa__FK_Pr__41EDCAC5]
GO
IF EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id = OBJECT_ID(N'[dbo].[FK__Participa__FK_Pr__42E1EEFE]') AND parent_object_id = OBJECT_ID(N'[dbo].[Participants]'))
ALTER TABLE [dbo].[Participants] DROP CONSTRAINT [FK__Participa__FK_Pr__42E1EEFE]
GO
IF EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id = OBJECT_ID(N'[dbo].[FK__Participa__FK_Pr__43D61337]') AND parent_object_id = OBJECT_ID(N'[dbo].[Participants]'))
ALTER TABLE [dbo].[Participants] DROP CONSTRAINT [FK__Participa__FK_Pr__43D61337]
GO
USE [EXTEND_D]
GO
/****** Object: Table [dbo].[Participants] Script Date: 12/17/2012 10:28:50 ******/
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Participants]') AND type in (N'U'))
DROP TABLE [dbo].[Participants]
GO
USE [EXTEND_D]
GO
/****** Object: Table [dbo].[Participants] Script Date: 12/17/2012 10:28:50 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[Participants](
[Participant_ID] [numeric](18, 0) IDENTITY(1,1) NOT NULL,
[StudyID] [varchar](10), NULL,
[LastName] [varchar](50), NULL,
[FirstName] [varchar](50), NULL,
[StreetAddress] [varchar](50), NULL,
[StreetAddress2] [varchar](25), NULL,
[City] [varchar] (50), NULL,
[State] [varchar] (2), NULL,
[ZipCode] [varchar] (10), NULL,
[Phone][varchar] (16), NULL,
[EmailAddress] [varchar] (50), NULL,
[CancerDiagnosis] [varchar] (50), NULL,
[DateDiagnosis] [datetime] NULL,
[HospitalName] [varchar] (50), NULL,
[DOB] [datetime] NULL,
[CreatedBy] [varchar](50), NULL,
[DateCreated] [datetime] NOT NULL,
[FK_ProjectID] [numeric](18, 0) NOT NULL,
CONSTRAINT [PK_Participants] PRIMARY KEY CLUSTERED
(
[Participant_ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING OFF
GO
ALTER TABLE [dbo].[Participants] WITH CHECK ADD FOREIGN KEY([FK_ProjectID])
REFERENCES [dbo].[Projects] ([Projects_ID])
GO
ALTER TABLE [dbo].[Participants] WITH CHECK ADD FOREIGN KEY([FK_ProjectID])
REFERENCES [dbo].[Projects] ([Projects_ID])
GO
ALTER TABLE [dbo].[Participants] WITH CHECK ADD FOREIGN KEY([FK_ProjectID])
REFERENCES [dbo].[Projects] ([Projects_ID])
GO
ALTER TABLE [dbo].[Participants] WITH CHECK ADD FOREIGN KEY([FK_ProjectID])
REFERENCES [dbo].[Projects] ([Projects_ID])
GO
Msg 3726, Level 16, State 1, Line 4
Could not drop object 'dbo.Participants' because it is referenced by a FOREIGN KEY constraint.
Msg 156, Level 15, State 1, Line 4
Incorrect syntax near the keyword 'NULL'.
Msg 319, Level 15, State 1, Line 24
Incorrect syntax near the keyword 'with'. If this statement is a common table expression, an xmlnamespaces clause or a change tracking context clause, the previous statement must be terminated with a semicolon.
Does anyone know how to work around the foreign key constraint to make these changes?
Thanks,
Laurie
