( 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
$conn = mssql_connect('MYSQLSERVER', 'sa', 'password');
mssql_select_db('[my data-base]', $conn);