Returns: A positive FrontBase result identifier to the
query result, or FALSE on
error.
fbsql_db_query() selects a
database and executes a query on it. If the optional link
identifier isn't specified, the function will try to find an
open link to the FrontBase server and if no such link is
found it'll try to create one as if
fbsql_connect() was called with no arguments
See also fbsql_connect().