sql编程题
RenShiWei 2022/1/21
# 一、学生成绩查询（自如三面）
CREATE TABLE `classes`
(
`name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
`classes` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL,
`score` int(10) NULL DEFAULT NULL
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of classes
-- ----------------------------
INSERT INTO `classes`
VALUES ('张三', '语文', 75);
INSERT INTO `classes`
VALUES ('张三', '数学', 82);
INSERT INTO `classes`
VALUES ('李四', '语文', 89);
INSERT INTO `classes`
VALUES ('李四', '数学', 92);
INSERT INTO `classes`
VALUES ('王五', '英语', 77);
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1、 查询所有科目都大于80分的学生
SELECT DISTINCT name
FROM grade
WHERE name NOT IN (SELECT DISTINCT name FROM grade WHERE score <= 80);
SELECT name
FROM grade
GROUP BY name
HAVING MIN(score) > 80;
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2、 查询平均分大于90分的学生
SELECT name
FROM (SELECT COUNT(*) AS t, SUM(score) AS num, name FROM `grade` GROUP BY name) AS a
WHERE a.num > 80 * t;
select name, avg(score) as sc
from grade g1
group by name
having avg(score) > 80;
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# 二、Java全栈知识体系 SQL编程题
# sql文件
/*
Navicat MySQL Data Transfer
Source Server : 本地mysql
Source Server Type : MySQL
Source Server Version : 80012
Source Host : localhost:3306
Source Schema : practice
Target Server Type : MySQL
Target Server Version : 80012
File Encoding : 65001
Date: 10/01/2022 20:24:48
*/
SET NAMES utf8mb4;
SET
FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for course
-- ----------------------------
DROP TABLE IF EXISTS `course`;
CREATE TABLE `course`
(
`CNO` varchar(5) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`CNAME` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`TNO` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of course
-- ----------------------------
INSERT INTO `course`
VALUES ('3-105', '计算机导论', '825');
INSERT INTO `course`
VALUES ('3-245', '操作系统', '804');
INSERT INTO `course`
VALUES ('6-166', '数据电路', '856');
INSERT INTO `course`
VALUES ('9-888', '高等数学', '100');
-- ----------------------------
-- Table structure for score
-- ----------------------------
DROP TABLE IF EXISTS `score`;
CREATE TABLE `score`
(
`SNO` varchar(3) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`CNO` varchar(5) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`DEGREE` decimal(10, 1) NOT NULL
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of score
-- ----------------------------
INSERT INTO `score`
VALUES ('103', '3-245', 86.0);
INSERT INTO `score`
VALUES ('105', '3-245', 75.0);
INSERT INTO `score`
VALUES ('109', '3-245', 68.0);
INSERT INTO `score`
VALUES ('103', '3-105', 92.0);
INSERT INTO `score`
VALUES ('105', '3-105', 88.0);
INSERT INTO `score`
VALUES ('109', '3-105', 76.0);
INSERT INTO `score`
VALUES ('101', '3-105', 64.0);
INSERT INTO `score`
VALUES ('107', '3-105', 91.0);
INSERT INTO `score`
VALUES ('101', '6-166', 85.0);
INSERT INTO `score`
VALUES ('107', '6-106', 79.0);
INSERT INTO `score`
VALUES ('108', '3-105', 78.0);
INSERT INTO `score`
VALUES ('108', '6-166', 81.0);
-- ----------------------------
-- Table structure for student
-- ----------------------------
DROP TABLE IF EXISTS `student`;
CREATE TABLE `student`
(
`SNO` varchar(3) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`SNAME` varchar(4) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`SSEX` varchar(2) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`SBIRTHDAY` datetime(0) NULL DEFAULT NULL,
`CLASS` varchar(5) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of student
-- ----------------------------
INSERT INTO `student`
VALUES ('108', '曾华', '男', '1977-09-01 00:00:00', '95033');
INSERT INTO `student`
VALUES ('105', '匡明', '男', '1975-10-02 00:00:00', '95031');
INSERT INTO `student`
VALUES ('107', '王丽', '女', '1976-01-23 00:00:00', '95033');
INSERT INTO `student`
VALUES ('101', '李军', '男', '1976-02-20 00:00:00', '95033');
INSERT INTO `student`
VALUES ('109', '王芳', '女', '1975-02-10 00:00:00', '95031');
INSERT INTO `student`
VALUES ('103', '陆君', '男', '1974-06-03 00:00:00', '95031');
-- ----------------------------
-- Table structure for teacher
-- ----------------------------
DROP TABLE IF EXISTS `teacher`;
CREATE TABLE `teacher`
(
`TNO` varchar(3) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`TNAME` varchar(4) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`TSEX` varchar(2) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
`TBIRTHDAY` datetime(0) NOT NULL,
`PROF` varchar(6) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`DEPART` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of teacher
-- ----------------------------
INSERT INTO `teacher`
VALUES ('804', '李诚', '男', '1958-12-02 00:00:00', '副教授', '计算机系');
INSERT INTO `teacher`
VALUES ('856', '张旭', '男', '1969-03-12 00:00:00', '讲师', '电子工程系');
INSERT INTO `teacher`
VALUES ('825', '王萍', '女', '1972-05-05 00:00:00', '助教', '计算机系');
INSERT INTO `teacher`
VALUES ('831', '刘冰', '女', '1977-08-14 00:00:00', '助教', '电子工程系');
SET
FOREIGN_KEY_CHECKS = 1;
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1、查询Student表中的所有记录的Sname、Ssex和Class列。
SELECT sname, ssex, class
FROM student;
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2、 查询教师所有的单位即不重复的Depart列。
SELECT DISTINCT depart
FROM teacher;
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3、 查询Student表的所有记录。
SELECT *
FROM student;
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4、 查询Score表中成绩在60到80之间的所有记录。
SELECT *
FROM score
WHERE degree BETWEEN 60 AND 80;
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5、 查询Score表中成绩为85，86或88的记录。
SELECT *
FROM score
WHERE degree IN (85, 86, 88);
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6、 查询Student表中“95031”班或性别为“女”的同学记录。
SELECT *
FROM student
WHERE class = "95031"
OR ssex = "女";
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7、 以Class降序查询Student表的所有记录。
SELECT *
FROM student
ORDER BY class DESC;
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8、 以Cno升序、Degree降序查询Score表的所有记录。
SELECT *
FROM score
ORDER BY cno ASC, degree DESC;
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9、 查询“95031”班的学生人数。
SELECT COUNT(1)
FROM student
WHERE class = "95031";
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10、查询Score表中的最高分的学生学号和课程号。
SELECT sno, cno
FROM score
GROUP BY sno, cno
HAVING MAX(degree);
###
错
select sno, CNO
from SCORE
where DEGREE = (select max(DEGREE) from SCORE);
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11、查询‘3-105’号课程的平均分。
SELECT AVG(degree)
FROM score
WHERE cno = "3-105";
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12、查询Score表中至少有5名学生选修的并以3开头的课程的平均分数。
SELECT AVG(degree)
FROM score
WHERE cno LIKE "3%"
GROUP BY cno
HAVING COUNT(sno) >= 5;
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13、查询最低分大于70，最高分小于90的Sno列。
SELECT sno
FROM score
GROUP BY sno
HAVING MIN(degree) > 70
AND MAX(degree) < 90;
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14、查询所有学生的Sname、Cno和Degree列。
SELECT sname, cno, degree
FROM student st
LEFT JOIN score sc ON st.sno = sc.sno;
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**15、查询所有学生的Sno、Cname和Degree列。**SELECT AVG(degree) FROM score WHERE sno IN (SELECT sno FROM student WHERE class = " 95033");
SELECT st.sno, cname, degree
FROM student st,
score sc,
course c
WHERE st.sno = sc.sno
AND sc.CNO = c.CNO;
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16、查询所有学生的Sname、Cname和Degree列。
SELECT sname, cname, degree
FROM student st,
score sc,
course c
WHERE st.sno = sc.sno
AND sc.CNO = c.CNO;
SELECT A.SNAME,
B.CNAME,
C.DEGREE
FROM STUDENT A
JOIN (COURSE B, SCORE C)
ON A.SNO = C.SNO AND B.CNO = C.CNO;
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17、查询“95033”班所选课程的平均分。
SELECT AVG(degree)
FROM score
WHERE sno IN (SELECT sno FROM student WHERE class = "95033");
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18、假设使用如下命令建立了一个grade表:
CREATE TABLE `grade`
(
`low` decimal(3, 0) NULL DEFAULT NULL,
`upp` decimal(3, 0) NULL DEFAULT NULL,
`rank` char(1) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;
insert into grade
values (90, 100, 'A');
insert into grade
values (80, 89, 'B');
insert into grade
values (70, 79, 'C');
insert into grade
values (60, 69, 'D');
insert into grade
values (0, 59, 'E');
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现查询所有同学的Sno、Cno和rank列。
SELECT s.sno, s.cno, g.rank
FROM score s,
grade g
WHERE s.degree BETWEEN g.low AND g.upp;
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19、查询选修“3-105”课程的成绩高于“109”号同学成绩的所有同学的记录。
SELECT *
FROM score
WHERE cno = "3-105"
AND degree > (SELECT degree FROM score WHERE sno = "109");
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20、查询score中选学一门以上课程的同学中分数为非最高分成绩的学生记录
SELECT *
FROM student
WHERE sno
IN (SELECT sno
FROM score
WHERE degree < (SELECT MAX(degree) FROM score)
GROUP BY sno
HAVING COUNT(cno) > 1);
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21、查询成绩高于学号为“109”、课程号为“3-105”的成绩的所有记录。
SELECT *
FROM score
WHERE cno = "3-105"
AND degree > (SELECT degree FROM score WHERE sno = "109" AND cno = "3-105");
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22、查询和学号为108的同学同年出生的所有学生的Sno、Sname和Sbirthday列。
SELECT sno, sname, sbirthday
FROM student
WHERE YEAR (sbirthday) = (SELECT YEAR (sbirthday) FROM student WHERE sno ="108");
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23、查询“张旭“教师任课的学生成绩。
SELECT s.degree
FROM teacher t,
score s,
course c
WHERE t.tno = c.tno
AND c.cno = s.cno
AND t.tname = "张旭";
SELECT *
FROM score s
WHERE cno = (SELECT cno
FROM course c
INNER JOIN teacher t ON t.tno = c.tno
WHERE t.tname = "张旭");
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24、查询选修某课程的同学人数多于5人的教师姓名。
SELECT tname
FROM teacher t
INNER JOIN course c
ON c.tno = t.tno
WHERE cno = (SELECT cno FROM score GROUP BY cno HAVING COUNT(sno) >= 5);
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25、查询95033班和95031班全体学生的记录。
SELECT *
FROM student
WHERE class = "95033"
OR class = "95031";
SELECT *
FROM student
WHERE class IN ("95033", "95031");
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26、查询存在有85分以上成绩的课程Cno.
SELECT cno
FROM score
GROUP BY cno
HAVING MAX(DEGREE) > 85;
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27、查询出“计算机系“教师所教课程的成绩表。
SELECT *
FROM score
WHERE cno IN
(SELECT cno
FROM teacher t
LEFT JOIN course c ON t.tno = c.tno
WHERE t.depart = '计算机系') ；
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28、查询“计算机系”与“电子工程系“不同职称的教师的Tname和Prof
SELECT tname,
prof
FROM teacher
WHERE depart = '计算机系'
AND prof NOT IN (
SELECT prof
FROM teacher
WHERE depart = '电子工程系'
);
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29、查询选修编号为“3-105“课程且成绩至少高于选修编号为“3-245”的同学的Cno、Sno和Degree,并按Degree从高到低次序排序。
SELECT sno, cno, degree
FROM score
WHERE cno = '3-105'
AND degree > ANY (SELECT degree FROM score WHERE cno = '3-245')
ORDER BY degree DESC;
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30、查询选修编号为“3-105”且成绩高于选修编号为“3-245”课程的同学的Cno、Sno和Degree.
SELECT sno, cno, degree
FROM score
WHERE cno = '3-105'
AND degree > ALL (SELECT degree FROM score WHERE cno = '3-245');
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31、查询所有教师和同学的name、sex和birthday.
SELECT tname name,
tsex sex,
tbirthday birthday
FROM teacher
UNION
SELECT sname name,
ssex sex,
sbirthday birthday
FROM student;
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32、查询所有“女”教师和“女”同学的name、sex和birthday.
SELECT tname name,
tsex sex,
tbirthday birthday
FROM teacher
WHERE tsex = '女'
UNION
SELECT sname name,
ssex sex,
sbirthday birthday
FROM student
WHERE ssex = '女';
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33、查询成绩比该课程平均成绩低的同学的成绩表。
SELECT s1.*
FROM score s1
WHERE degree < (
SELECT AVG(degree)
FROM score s2
WHERE s1.cno = s2.cno);
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34、查询所有任课教师的Tname和Depart.
SELECT tname,
depart
FROM teacher t
WHERE EXISTS(SELECT tno
FROM course c
WHERE t.TNO = c.TNO);
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SELECT tname,
depart
FROM teacher t
WHERE tno IN (SELECT tno
FROM course);
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35、查询所有未讲课的教师的Tname和Depart.
SELECT tname,
depart
FROM teacher t
WHERE NOT EXISTS(SELECT tno
FROM course c
WHERE t.TNO = c.TNO);
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SELECT tname,
depart
FROM teacher t
WHERE tno NOT IN (SELECT tno
FROM course);
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36、查询至少有2名男生的班号。
SELECT class
FROM student
WHERE ssex = '男'
GROUP BY class
HAVING COUNT(class) >= 2;
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37、查询Student表中不姓“王”的同学记录。
SELECT *
FROM student
WHERE sname NOT LIKE '王%';
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38、查询Student表中每个学生的姓名和年龄。
SELECT sname, YEAR (NOW())- YEAR (sbirthday)
FROM student;
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39、查询Student表中最大和最小的Sbirthday日期值。
SELECT MAX(sbirthday) max_sbirthday, MIN(sbirthday) min_sbirthday
FROM student;
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40、以班号和年龄从大到小的顺序查询Student表中的全部记录。
SELECT *
FROM student
ORDER BY class DESC, YEAR (NOW())- YEAR (sbirthday) DESC;
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41、查询“男”教师及其所上的课程。
SELECT c.*
FROM teacher t
LEFT JOIN course c ON t.tno = c.tno
WHERE t.tsex = '男';
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42、查询最高分同学的Sno、Cno和Degree列。
SELECT sno,
cno,
degree
FROM score
WHERE DEGREE = (SELECT MAX(degree)
FROM score);
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43、查询和“李军”同性别的所有同学的Sname.
SELECT sname
FROM student
WHERE ssex = (SELECT ssex FROM student WHREE sname = '李军');
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44、查询和“李军”同性别并同班的同学Sname.
SELECT sname
FROM student
WHERE (ssex, class) = (SELECT ssex, class FROM student WHREE sname = '李军');
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45、查询所有选修“计算机导论”课程的“男”同学的成绩表
SELECT *
FROM score,
student
WHERE score.SNO = student.SNO
and ssex = '男'
and cno = (
SELECT cno
FROM course
WHERE cname = '计算机导论');
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