mysql连接查询测试题

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试题一、找出平均成绩大于60的所有学生的学号（即student_id)和姓名

试题二、查询所有学生的学号，姓名，选课数和总成绩；

试题三、查找名字中含有”大“的老师的个数

试题四、查询没有学过天老师课的同学的学号、姓名

试题五、查询学过“4”且学过编号“5”课程的同学的学号

试题六、查询编号“1”成绩比编号“2”成绩低的学生的学号

试题七、找出有一门课程低于60分的学生的学号和名字

试题八、查询选完全部课程的学生的学号

试题九、按平均成绩从高到低，显示所有学生的各科课程成绩

试题十、查询各科成绩的最高分和最低分及对应的学生姓名学号。

试题一答案

试题二答案

试题三答案

试题四答案

试题五答案

试题六答案

试题七答案

试题八答案

/*
Navicat MySQL Data Transfer

Source Server         : 127.0.0.1
Source Server Version : 50505
Source Host           : 127.0.0.1:3306
Source Database       : student

Target Server Type    : MYSQL
Target Server Version : 50505
File Encoding         : 65001

Date: 2019-08-15 11:45:16
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for `class`
-- ----------------------------
DROP TABLE IF EXISTS `class`;
CREATE TABLE `class` (
  `class_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `caption` varchar(255) NOT NULL,
  PRIMARY KEY (`class_id`)
) ENGINE=MyISAM AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of class
-- ----------------------------
INSERT INTO `class` VALUES ('1', '三年级一班');
INSERT INTO `class` VALUES ('2', '三年级二班');
INSERT INTO `class` VALUES ('3', '三年级三班');

-- ----------------------------
-- Table structure for `course`
-- ----------------------------
DROP TABLE IF EXISTS `course`;
CREATE TABLE `course` (
  `course_id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(20) NOT NULL,
  `teacher_id` int(11) NOT NULL DEFAULT '0',
  PRIMARY KEY (`course_id`)
) ENGINE=MyISAM AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of course
-- ----------------------------
INSERT INTO `course` VALUES ('1', '生物', '1');
INSERT INTO `course` VALUES ('2', '体育', '2');
INSERT INTO `course` VALUES ('3', '物理', '3');
INSERT INTO `course` VALUES ('4', '美术', '4');
INSERT INTO `course` VALUES ('5', '音乐', '4');

-- ----------------------------
-- Table structure for `score`
-- ----------------------------
DROP TABLE IF EXISTS `score`;
CREATE TABLE `score` (
  `score_id` int(11) NOT NULL AUTO_INCREMENT,
  `student_id` int(11) NOT NULL DEFAULT '0',
  `course_id` int(11) NOT NULL DEFAULT '0',
  `number` int(11) NOT NULL DEFAULT '0',
  PRIMARY KEY (`score_id`)
) ENGINE=MyISAM AUTO_INCREMENT=25 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of score
-- ----------------------------
INSERT INTO `score` VALUES ('1', '1', '1', '58');
INSERT INTO `score` VALUES ('2', '2', '1', '78');
INSERT INTO `score` VALUES ('3', '3', '1', '78');
INSERT INTO `score` VALUES ('4', '2', '2', '89');
INSERT INTO `score` VALUES ('5', '1', '2', '98');
INSERT INTO `score` VALUES ('6', '4', '3', '100');
INSERT INTO `score` VALUES ('7', '1', '3', '99');
INSERT INTO `score` VALUES ('8', '1', '4', '91');
INSERT INTO `score` VALUES ('9', '1', '5', '71');
INSERT INTO `score` VALUES ('10', '2', '3', '99');
INSERT INTO `score` VALUES ('11', '2', '4', '79');
INSERT INTO `score` VALUES ('12', '2', '5', '59');
INSERT INTO `score` VALUES ('13', '3', '2', '99');
INSERT INTO `score` VALUES ('14', '3', '3', '99');
INSERT INTO `score` VALUES ('15', '3', '4', '69');
INSERT INTO `score` VALUES ('16', '3', '5', '49');
INSERT INTO `score` VALUES ('17', '4', '1', '69');
INSERT INTO `score` VALUES ('18', '4', '2', '59');
INSERT INTO `score` VALUES ('19', '4', '4', '84');
INSERT INTO `score` VALUES ('20', '4', '5', '80');
INSERT INTO `score` VALUES ('21', '5', '1', '49');
INSERT INTO `score` VALUES ('22', '5', '2', '68');
INSERT INTO `score` VALUES ('23', '5', '3', '67');
INSERT INTO `score` VALUES ('24', '5', '4', '89');

-- ----------------------------
-- Table structure for `student`
-- ----------------------------
DROP TABLE IF EXISTS `student`;
CREATE TABLE `student` (
  `student_id` int(11) NOT NULL AUTO_INCREMENT,
  `class_id` int(11) NOT NULL DEFAULT '0',
  `name` varchar(20) NOT NULL,
  `gender` varchar(20) NOT NULL,
  PRIMARY KEY (`student_id`)
) ENGINE=MyISAM AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of student
-- ----------------------------
INSERT INTO `student` VALUES ('1', '1', '巨炮', '男');
INSERT INTO `student` VALUES ('2', '1', '钢蛋', '男');
INSERT INTO `student` VALUES ('3', '2', '七次郎', '男');
INSERT INTO `student` VALUES ('4', '2', '米线', '女');
INSERT INTO `student` VALUES ('5', '3', '辣条', '女');

-- ----------------------------
-- Table structure for `teacher`
-- ----------------------------
DROP TABLE IF EXISTS `teacher`;
CREATE TABLE `teacher` (
  `teacher_id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(20) NOT NULL,
  PRIMARY KEY (`teacher_id`)
) ENGINE=MyISAM AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of teacher
-- ----------------------------
INSERT INTO `teacher` VALUES ('1', '苍井空');
INSERT INTO `teacher` VALUES ('2', '麻生希');
INSERT INTO `teacher` VALUES ('3', '大桥未久');
INSERT INTO `teacher` VALUES ('4', '波多野结衣');
INSERT INTO `teacher` VALUES ('5', '天海翼');