text: CREATE TABLE `calendar` ( `service_id` VARCHAR(3) NOT NULL ,
  `monday` VARCHAR(1) NOT NULL ,
  `tuesday` VARCHAR(1) NOT NULL ,
  `wednesday` VARCHAR(1) NOT NULL ,
  `thursday` VARCHAR(1) NOT NULL ,
  `friday` VARCHAR(1) NOT NULL ,
  `saturday` VARCHAR(1) NOT NULL ,
  `sunday` VARCHAR(1) NOT NULL ,
  `start_date` VARCHAR(8) NOT NULL ,
  `end_date` VARCHAR(8) NOT NULL ,
  PRIMARY KEY (`service_id`));
  INSERT INTO `calendar` ( `service_id`,`monday`,`tuesday`,`wednesday`,`thursday`,`friday`,`saturday`,`sunday`,`start_date`,`end_date`) VALUES 
  ("USD","1","1","1","1","1","1","1","20080101","20190101"),
  ("U__","1","1","1","1","1","0","0","20080101","20190101"),
  ("US_","1","1","1","1","1","1","0","20080101","20190101"),
  ("_SD","0","0","0","0","0","1","1","20080101","20190101"),
  ("__D","0","0","0","0","0","0","1","20080101","20190101"),
  ("_S_","0","0","0","0","0","1","0","20080101","20190101");