sql backup

Signed-off-by: Chenx221 <chenx221@yandex.com>

project2/project2.sql

@@ -11,12 +11,31 @@
  Target Server Version : 80033 (8.0.33)
  File Encoding         : 65001
 
- Date: 16/06/2023 21:12:31
+ Date: 17/06/2023 10:27:53
 */
 
 SET NAMES utf8mb4;
 SET FOREIGN_KEY_CHECKS = 0;
 
+-- ----------------------------
+-- Table structure for class
+-- ----------------------------
+DROP TABLE IF EXISTS `class`;
+CREATE TABLE `class`  (
+  `class_id` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '1班~5班',
+  `class_description` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '班级描述',
+  PRIMARY KEY (`class_id`) USING BTREE
+) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;
+
+-- ----------------------------
+-- Records of class
+-- ----------------------------
+INSERT INTO `class` VALUES ('1班', NULL);
+INSERT INTO `class` VALUES ('2班', NULL);
+INSERT INTO `class` VALUES ('3班', NULL);
+INSERT INTO `class` VALUES ('4班', NULL);
+INSERT INTO `class` VALUES ('5班', NULL);
+
 -- ----------------------------
 -- Table structure for course
 -- ----------------------------
@@ -202,7 +221,9 @@ CREATE TABLE `student`  (
   `removed` int NULL DEFAULT 0 COMMENT '移除的记录(default: 0 false)',
   `photo` blob NULL COMMENT '照片(可选)(暂未实现)',
   `user_id` int NOT NULL COMMENT '对应的user表id',
-  PRIMARY KEY (`id`) USING BTREE
+  PRIMARY KEY (`id`) USING BTREE,
+  INDEX `fk_student_classes`(`classes` ASC) USING BTREE,
+  CONSTRAINT `fk_student_classes` FOREIGN KEY (`classes`) REFERENCES `class` (`class_id`) ON DELETE RESTRICT ON UPDATE RESTRICT
 ) ENGINE = InnoDB AUTO_INCREMENT = 1004 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = DYNAMIC;
 
 -- ----------------------------
@@ -1226,7 +1247,9 @@ CREATE TABLE `teacher`  (
   `removed` int NULL DEFAULT 0 COMMENT '移除字段(default:0 false)',
   PRIMARY KEY (`id`) USING BTREE,
   INDEX `fk_teacher_course`(`course_id` ASC) USING BTREE,
-  CONSTRAINT `fk_teacher_course` FOREIGN KEY (`course_id`) REFERENCES `course` (`CourseID`) ON DELETE RESTRICT ON UPDATE RESTRICT
+  INDEX `fk_teacher_classes`(`classes` ASC) USING BTREE,
+  CONSTRAINT `fk_teacher_course` FOREIGN KEY (`course_id`) REFERENCES `course` (`CourseID`) ON DELETE RESTRICT ON UPDATE RESTRICT,
+  CONSTRAINT `fk_teacher_classes` FOREIGN KEY (`classes`) REFERENCES `class` (`class_id`) ON DELETE RESTRICT ON UPDATE RESTRICT
 ) ENGINE = InnoDB AUTO_INCREMENT = 21 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = DYNAMIC;
 
 -- ----------------------------