foreign key and index issue
- by George2
Hello everyone,
I am using SQL Server 2008 Enterprise. I have a table and one of its column is referring to another column in another table (in the same database) as foreign key, here is the related SQL statement, in more details, column [AnotherID] in table [Foo] refers to another table [Goo]'s column [GID] as foreign key. [GID] is primary key and clustered index on table [Goo].
My question is, in this way, if I do not create index on [AnotherID] column on [Foo] explicitly, will there be an index created automatically for [AnotherID] column on [Foo] -- because its foreign key reference column [GID] on table [Goo] already has primary clustered key index?
CREATE TABLE [dbo].[Foo](
[ID] [bigint] IDENTITY(1,1) NOT NULL,
[AnotherID] [int] NULL,
[InsertTime] [datetime] NULL CONSTRAINT DEFAULT (getdate()),
CONSTRAINT [PK_Foo] PRIMARY KEY CLUSTERED
(
[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]
ALTER TABLE [dbo].[Foo] WITH CHECK ADD CONSTRAINT [FK_Foo] FOREIGN KEY([Goo])
REFERENCES [dbo].[Goo] ([GID])
ALTER TABLE [dbo].[Foo] CHECK CONSTRAINT [FK_Foo]
thanks in advance,
George
