Description
bool 
mssql_select_db ( string database_name [, resource link_identifier] )
     Returns TRUE on success or FALSE on failure.
    
 
     mssql_select_db() sets the current active
     database on the server that's associated with the specified link
     identifier.  If no link identifier is specified, the last opened
     link is assumed.  If no link is open, the function will try to
     establish a link as if mssql_connect() was
     called, and use it.
    
     Every subsequent call to mssql_query() will be
     made on the active database.
    
     To escape the name of a database that contains spaces, hyphens ("-"), or
     any other exceptional characters, the database name must be enclosed in
     brackets, as is shown in the example, below. This technique must also be
     applied when selecting a database name that is also a reserved word
     (such as "primary").
    
Example 1. mssql_select_db() example 
<?php     $conn = mssql_connect('MYSQLSERVER', 'sa', 'password');     mssql_select_db('[my data-base]', $conn); ?>
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 See also:
     mssql_connect(), 
     mssql_pconnect(), and
     mssql_query()