Following may be very simple to some and helpful to other type of question. I have seen this in my server log as well as this has been always first question in my Developer Team.
Where is SQL SERVER 2005 Query Analyzer?
SQL SERVER 2005 has combined Query Analyzer and Enterprise Manager into one Microsoft SQL SERVER Management Studio (MSSMS). To see the familiour Query Analyzer Window follow the image below.
Reference : Pinal Dave (http://blog.SQLAuthority.com)