MySQL在插入/更新事件时触发

在Grijesh的完美帮助和他使用条件语句的建议下，我能够获得 一个 执行两项任务的触发器。再次感谢Grijesh

 DELIMITER $$  CREATE TRIGGER update_count AFTER INSERT ON ext_words  FOR EACH ROW    BEGIN     IF NOT EXISTS (SELECT 1 FROM ext_words_count WHERe word = NEW.word) THEN       INSERT INTO ext_words_count (word) VALUES (NEW.word);   ELSE       UPDATE ext_words_count SET word_count = word_count + 1 WHERe word = NEW.word;   END IF;  END $$     DELIMITER;