mysql trigger example
-- The following statement creates an AFTER UPDATE trigger on the sales table:
DELIMITER $$
CREATE TRIGGER after_sales_update
AFTER UPDATE
ON sales FOR EACH ROW
BEGIN
IF OLD.quantity <> new.quantity THEN
INSERT INTO SalesChanges(salesId,beforeQuantity, afterQuantity)
VALUES(old.id, old.quantity, new.quantity);
END IF;
END$$
DELIMITER ;trigger in mysql
CREATE TRIGGER Product_Details_tr
BEFORE INSERT ON Product_Details
FOR EACH ROW
SET NEW.User_ID = CURRENT_USER();Copyright © 2021 Codeinu
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