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  Create trigger in MySQL

To create trigger in MySQL, the syntax is :CREATE [DEFINER = { user | CURRENT_USER }] TRIGGER trigger_name trigger_time trigger_event ON tbl_name FOR EACH ROW trigger_bodyOne example is :DELIMITER %%DROP TRIGGER IF EXISTS delete_commentCREATE TRIGGER delete_comment AFTER DELETE ON file_generate_infoFOR EACH ROW BEGIN DELETE FROM article_comment WHERE article_id=OLD.article_id;END%%The whole create trigger statement should be complete statement but not many separate com...

1,407 0 0          MYSQL TRIGGER DILIMITER PHPMYADMIN


  An example of SQL outer join

SELECT MEMBER.Name, MEMBER.Address, ORGANIZER.phoneNo, TRAVEL.Tour_Name, TRAVEL.Start_Date, TRAVEL.End_Date FROM TRAVEL RIGHT JOIN ((MEMBER LEFT JOIN ORGANIZER ON MEMBER.Member_ID=ORGANIZER.memberID) LEFT JOIN PARTICIPATION ON MEMBER.Member_ID=PARTICIPATION.MemberID) ON TRAVEL.TravelID=PARTICIPATION.TravelID;...

1,491 0 0          ACCESS SQL OUTER JOIN