CREATE TRIGGER `before_delete` BEFORE DELETE ON `barcode_master` 

FOR EACH ROW BEGIN 

UPDATE library_emp_master SET job_type = 1 WHERE barcode_no =   OLD.barcode_no; 

END;

DROP TRIGGER IF EXISTS testTrigger;

CREATE TRIGGER testTrigger 

BEFORE INSERT ON tbl_table1 

FOR EACH ROW 

BEGIN 

  INSERT INTO tbl_table2 VALUES (NEW.id,NEW.name);

END;

 delimiter // 

 CREATE TRIGGER removeforeing 

  BEFORE DELETE ON products

  FOR EACH ROW BEGIN

    DELETE FROM sales_details WHERE product_code = OLD.product_code;

 END// 

 delimiter ;

CREATE TRIGGER before_insert_money BEFORE INSERT ON money

FOR EACH ROW UPDATE accounts SET balance=10.0;

delimiter //

CREATE TRIGGER before_insert_money BEFORE INSERT ON money

FOR EACH

ROW

BEGIN

    UPDATE accounts SET balance=10.0;

END;

//

delimiter ;

delimiter $$

CREATE TRIGGER copy_pid AFTER INSERT on upload FOR EACH ROW 

​

BEGIN

​

INSERT INTO rating (uid,pid) VALUES (NEW.username,NEW.id);

​

END$$

delimiter ;

CREATE TRIGGER testTrigger 

BEFORE INSERT ON tbl_table1 

FOR EACH ROW 

BEGIN 

    INSERT INTO tbl_table2 (id,name) values (NEW.id,NEW.name); 

END

CREATE TRIGGER after_update

       AFTER UPDATE ON hodm

       FOR EACH ROW 

​

       INSERT INTO hodm_log

       SET log_action = 'update',

        user_name = NEW.user_name,

           log_timestamp = NOW();

ALTER TABLE sales_details

ADD FOREIGN KEY fk_product_code(product_code)

REFERENCES products(product_code)

ON DELETE CASCADE;

CREATE TABLE contacts

( contact_id INT(11) NOT NULL AUTO_INCREMENT,

  last_name VARCHAR(30) NOT NULL,

  first_name VARCHAR(25),

  birthday DATE,

  CONSTRAINT contacts_pk PRIMARY KEY (contact_id)

);