int mysql_query(string query, int [link_identifier]
);mysql_query() sends a query to the currently active database on the server that's associated with the specified link identifier. If 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 mysql_connect() was called, and use it.
This function returns TRUE or FALSE to indicate the success of UPDATE, INSERT, and DELETE queries. For SELECT queries it returns a new result identifier. The resources used by the query can then be freed by calling mysql_free_result().
See also: mysql_db_query(), mysql_select_db(), and mysql_connect().