触发MySql插入或更新

Question

I need a mysql trigger after insert OR Update a table i want to add to table notifications (and in future send email notifications)

trigger insert work fine Trigger update have a problem, if I edit "word" he insert correctly, but if I edit again... i receive a error because e try to insert in table notifications the same id

    table_real
    -------------
    | id | word | news |
    -------------
    | 1  | this | this |
    -------------
    | 2  | that | this |
    -------------
    | 3  | this | this |
    -------------

    tablenotifications
    ---------------------
    | id | word | news |
    ---------------------
    | 1  | this |   2   |
    ---------------------
    | 2  | that |   1   |


DELIMITER $$
CREATE
    TRIGGER `trigger_insert` AFTER INSERT
    ON `table_real` 
    FOR EACH ROW BEGIN
        INSERT INTO tablenotifications(id, word, news) VALUES (new.id, new.word, new.news);

    END$$

DELIMITER ;


DELIMITER $$
CREATE
    TRIGGER `trigger_update` AFTER UPDATE 
    ON `table_real` 
    FOR EACH ROW BEGIN

        INSERT INTO tablenotifications (id, word, news) VALUES (new.id, new.word, new.news);

    END$$

DELIMITER ;

Solution: Edit table, change my primary key

Answer 1

when eciting a table, instead of inserting, update the row that corresponds to the edited id.

DELIMITER $$
CREATE
TRIGGER `trigger_update` AFTER UPDATE 
ON `table_real` 
FOR EACH ROW BEGIN

    UPDATE  tablenotifications SET id=new.id,  word=new.word, news=new.news;

END$$