trigger in mysql syntax
CREATE TRIGGER trigger_name
{BEFORE | AFTER} {INSERT | UPDATE| DELETE }
ON table_name FOR EACH ROW
trigger_body;trigger in mysql syntax
CREATE TRIGGER trigger_name
{BEFORE | AFTER} {INSERT | UPDATE| DELETE }
ON table_name FOR EACH ROW
trigger_body;trigger in mysql
CREATE TRIGGER Product_Details_tr
BEFORE INSERT ON Product_Details
FOR EACH ROW
SET NEW.User_ID = CURRENT_USER();creation d'un trigger sql
CREATE OR REPLACE TRIGGER trigg_example
BEFORE INSERT OR UPDATE ON table_example
FOR EACH ROW
WHEN (new.no_line > 0)
DECLARE
evol_exemple number;
BEGIN
evol_exemple := :new.exemple - :old.exemple;
DBMS_OUTPUT.PUT_LINE(' evolution : ' || evol_exemple);
END;mysql triggers
DELIMITER $$
CREATE TRIGGER before_workcenters_insert
BEFORE INSERT
ON WorkCenters FOR EACH ROW
BEGIN
DECLARE rowcount INT;
SELECT COUNT(*)
INTO rowcount
FROM WorkCenterStats;
IF rowcount > 0 THEN
UPDATE WorkCenterStats
SET totalCapacity = totalCapacity + new.capacity;
ELSE
INSERT INTO WorkCenterStats(totalCapacity)
VALUES(new.capacity);
END IF;
END $$
DELIMITER ;Copyright © 2021 Codeinu
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