text: // TRIGER CATEGORY
  
  DELIMITER$$
  CREATE OR REPLACE TRIGGER ID_CATEGORY 
  BEFORE INSERT ON categories
  FOR EACH ROW
  BEGIN 
  	INSERT INTO tsequancecategory VALUES ("");
  	SELECT MAX(category_id) INTO @ID
  	FROM tsequancecategory;
  	SET new.CATEGORY_ID=CONCAT('CAT',LPAD(@ID,2,'0'));
  END$$
  DELIMITER ;
  
  // TRIGER CUSTOMER
  
  DELIMITER$$
  CREATE OR REPLACE TRIGGER ID_CUSTOMER
  BEFORE INSERT ON customer
  FOR EACH ROW
  BEGIN 
  	INSERT INTO tsequancecustomer2 VALUES ("");
  	SELECT MAX(customer_id) INTO @ID
  	FROM tsequancecustomer2;
  	SET new.CUSTOMER_ID=CONCAT('CUS',LPAD(@ID,3,'0'));
  END$$
  DELIMITER ;
  
  // TRIGER PRODUCT
  
  DELIMITER$$
  CREATE OR REPLACE TRIGGER ID_PRODUCT
  BEFORE INSERT ON product
  FOR EACH ROW
  BEGIN 
  	INSERT INTO tsequanceproduct VALUES ("");
  	SELECT MAX(product_id) INTO @ID
  	FROM tsequanceproduct;
  	SET new.PRODUCT_ID=CONCAT('PRO',LPAD(@ID,3,'0'));
  END$$
  DELIMITER ;
  
  // TRIGER TUSER
  
  DELIMITER$$
  CREATE OR REPLACE TRIGGER ID_USER
  BEFORE INSERT ON USER
  FOR EACH ROW
  BEGIN 
  	INSERT INTO tsequanceuser VALUES ("");
  	SELECT MAX(user_id) INTO @ID
  	FROM tsequanceuser;
  	SET new.USER_ID=CONCAT('US',LPAD(@ID,3,'0'));
  END$$
  DELIMITER ;
  
  INSERT INTO 