You are here: Re: Do foreign keys generate implicit indexes? « MsSQL Server « IT news, forums, messages
Re: Do foreign keys generate implicit indexes?

Posted by Jack Vamvas on 09/24/07 07:25

Also, analyse your query requirements then apply an Indexing Strategy

--

Jack Vamvas
___________________________________
Need an IT job? http://www.ITjobfeed.com/SQL




<bobdurie@gmail.com> wrote in message
news:1190404274.471197.197240@n39g2000hsh.googlegroups.com...
> If i create a simple table with a foreign key constraint, does it
> create an implicit index on that given ID? I've been told this is
> done in some databases, but i need to know for sure if SQL Server does
> it. Has anyone heard of this before, on any other databses perhaps?
>
> Heres an example of how the foreign key constraint is being added:
>
> ALTER TABLE [dbo].[administrators] WITH CHECK ADD CONSTRAINT
> [FPSLUFSUOXZGAJOJ] FOREIGN KEY([AdministratorRoleID])
> REFERENCES [dbo].[administratorroles] ([AdministratorRoleID])
>
> My initial testing seems to indicate adding an index on the foreign
> key column helps, but i need to know for sure. Any insight would be
> greatly appreciated!
>
> Bob
>

 

Navigation:

[Reply to this message]


Удаленная работа для программистов  •  Как заработать на Google AdSense  •  England, UK  •  статьи на английском  •  PHP MySQL CMS Apache Oscommerce  •  Online Business Knowledge Base  •  DVD MP3 AVI MP4 players codecs conversion help
Home  •  Search  •  Site Map  •  Set as Homepage  •  Add to Favourites

Copyright © 2005-2006 Powered by Custom PHP Programming

Сайт изготовлен в Студии Валентина Петручека
изготовление и поддержка веб-сайтов, разработка программного обеспечения, поисковая оптимизация