work on presence changes (has error)

queries/20200908-user-kid-lease.sql

@@ -0,0 +1,7 @@
+CREATE TABLE `badminton_coach`.`user_kid_lease` (
+  `ukl_id` INT NOT NULL AUTO_INCREMENT,
+  `ukl_user_kid_uk_id` INT NOT NULL,
+  `ukl_lease_l_id` INT NOT NULL,
+  PRIMARY KEY (`ukl_id`),
+  INDEX `index2` (`ukl_user_kid_uk_id` ASC),
+  INDEX `index3` (`ukl_lease_l_id` ASC));