SQL面试50题------（初始化工作、建立表格）

文章目录

• 1、建表
• • 1.1 学生表和插入数据
  • 1.2 教师表和数据
  • 1.3 课程表和数据
  • 1.4 成绩表和数据
• 2、数据库数据
• • 2.1 学生表
  • 2.2 教师表
  • 2.3 课程表
  • 2.4 得分表

1、建表

1.1 学生表和插入数据

|学号| 姓名|生日|性别|
|–|–|–|–|–|
|s_id |s_name |s_birth|s_sex|

sql脚本

-- ----------------------------
-- Table structure for student
-- ----------------------------
DROP TABLE IF EXISTS `student`;
CREATE TABLE `student` (
  `s_id` varchar(20) NOT NULL COMMENT '学号',
  `s_name` varchar(20) NOT NULL COMMENT '姓名',
  `s_birth` varchar(20) NOT NULL COMMENT '生日',
  `s_sex` varchar(10) NOT NULL COMMENT '性别',
  PRIMARY KEY (`s_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='学生表';

-- ----------------------------
-- Records of student
-- ----------------------------
INSERT INTO `student` VALUES ('01', '赵雷', '1990-01-01', '男');
INSERT INTO `student` VALUES ('02', '钱电', '1990-12-21', '男');
INSERT INTO `student` VALUES ('03', '孙风', '1990-05-20', '男');
INSERT INTO `student` VALUES ('04', '李云', '1990-08-06', '男');
INSERT INTO `student` VALUES ('05', '周梅', '1991-12-01', '女');
INSERT INTO `student` VALUES ('06', '吴兰', '1992-03-01', '女');
INSERT INTO `student` VALUES ('07', '郑竹', '1989-07-01', '女');
INSERT INTO `student` VALUES ('08', '王菊', '1990-01-20', '女');

1.2 教师表和数据

t_id	t_name
j教师编号	教师姓名

-- ----------------------------
-- Table structure for teacher
-- ----------------------------
DROP TABLE IF EXISTS `teacher`;
CREATE TABLE `teacher` (
  `t_id` varchar(20) NOT NULL COMMENT '教师主键',
  `t_name` varchar(20) NOT NULL COMMENT '教师姓名',
  PRIMARY KEY (`t_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='教师表';

-- ----------------------------
-- Records of teacher
-- ----------------------------
INSERT INTO `teacher` VALUES ('01', '张三');
INSERT INTO `teacher` VALUES ('02', '李四');
INSERT INTO `teacher` VALUES ('03', '王五');

1.3 课程表和数据

课程号	课程名称	学号
c_id	c_name	t_id

-- ----------------------------
-- Table structure for course
-- ----------------------------
DROP TABLE IF EXISTS `course`;
CREATE TABLE `course` (
  `c_id` varchar(20) NOT NULL COMMENT '课程号',
  `c_name` varchar(20) NOT NULL COMMENT '课程名称',
  `t_id` varchar(20) NOT NULL COMMENT '学号',
  PRIMARY KEY (`c_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='课程表';

-- ----------------------------
-- Records of course
-- ----------------------------
INSERT INTO `course` VALUES ('01', '语文', '02');
INSERT INTO `course` VALUES ('02', '数学', '01');
INSERT INTO `course` VALUES ('03', '英语', '03');

1.4 成绩表和数据

s_id	c_id	s_score
学号	课程号	得分

-- ----------------------------
-- Table structure for score
-- ----------------------------
DROP TABLE IF EXISTS `score`;
CREATE TABLE `score` (
  `s_id` varchar(20) NOT NULL COMMENT '学号',
  `c_id` varchar(20) NOT NULL COMMENT '课程号',
  `s_score` int(3) DEFAULT NULL COMMENT '得分',
  PRIMARY KEY (`s_id`,`c_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='联合主键';

-- ----------------------------
-- Records of score
-- ----------------------------
INSERT INTO `score` VALUES ('01', '01', '80');
INSERT INTO `score` VALUES ('01', '02', '90');
INSERT INTO `score` VALUES ('01', '03', '99');
INSERT INTO `score` VALUES ('02', '01', '70');
INSERT INTO `score` VALUES ('02', '02', '60');
INSERT INTO `score` VALUES ('02', '03', '80');
INSERT INTO `score` VALUES ('03', '01', '80');
INSERT INTO `score` VALUES ('03', '02', '80');
INSERT INTO `score` VALUES ('03', '03', '80');
INSERT INTO `score` VALUES ('04', '01', '50');
INSERT INTO `score` VALUES ('04', '02', '30');
INSERT INTO `score` VALUES ('04', '03', '20');
INSERT INTO `score` VALUES ('05', '01', '76');
INSERT INTO `score` VALUES ('05', '02', '87');
INSERT INTO `score` VALUES ('06', '01', '31');
INSERT INTO `score` VALUES ('06', '03', '34');
INSERT INTO `score` VALUES ('07', '02', '89');
INSERT INTO `score` VALUES ('07', '03', '98');

2、数据库数据

2.1 学生表

2.2 教师表

2.3 课程表

2.4 得分表

（1-10）：https://blog.csdn.net/weixin_43304253/article/details/122378005