( string query [, resource link_identifier] )
Returns a positive Sybase result identifier on success, FALSE on error,
or TRUE if the query was successful but didn't return any columns.
sybase_query() sends a query to the currently
active database on the server that's associated with the specified
link identifier. If the link identifier isn't specified, the last
opened link is assumed. If no link is open, the function tries to
establish a link as if sybase_connect() was
called, and use it.