From b92b705e86fe4d02a6cd99896f37ecec4337adb7 Mon Sep 17 00:00:00 2001 From: Your Name Date: Thu, 8 Jul 2021 17:34:19 +0800 Subject: [PATCH 1/2] sql --- fyt.sql | 192 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 192 insertions(+) create mode 100644 fyt.sql diff --git a/fyt.sql b/fyt.sql new file mode 100644 index 0000000..f5470f3 --- /dev/null +++ b/fyt.sql @@ -0,0 +1,192 @@ +-- 学生信息 +INSERT INTO STUDENT VALUES(01 , '赵雷' , to_date('1990-01-01','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(02 , '钱电' , to_date('1990-12-21','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(03 , '孙风' , to_date('1990-12-20','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(04 , '李云' , to_date('1990-12-06','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(05 , '周梅' , to_date('1991-12-01','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(06 , '吴兰' , to_date('1992-01-01','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(07 , '郑彭' , to_date('1989-01-01','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(09 , '张三' , to_date('2017-12-20','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(10 , '李四' , to_date('2017-12-25','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(11 , '李四' , to_date('2012-06-06','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(12 , '赵六' , to_date('2013-06-13','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(13 , '孙七' , to_date('2014-06-01','YYYY-MM-DD') , 'f'); + +-- 课程信息 +INSERT INTO COURSE VALUES(01 , '语文' , 02); +INSERT INTO COURSE VALUES(02 , '数学' , 01); +INSERT INTO COURSE VALUES(03 , '英语' , 03); + +-- 教师信息 +INSERT INTO TEACHER VALUES(01 , '张三'); +INSERT INTO TEACHER VALUES(02 , '李四'); +INSERT INTO TEACHER VALUES(03 , '王五'); + +-- 成绩 +INSERT INTO SCORE VALUES(1,1 , 1 , 80); +INSERT INTO SCORE VALUES(2,1 , 2 , 90); +INSERT INTO SCORE VALUES(3,1 , 3 , 99); +INSERT INTO SCORE VALUES(4,2 , 1 , 70); +INSERT INTO SCORE VALUES(5,2 , 2 , 60); +INSERT INTO SCORE VALUES(6,2 , 3 , 80); +INSERT INTO SCORE VALUES(7,3 , 1 , 80); +INSERT INTO SCORE VALUES(8,3 , 2 , 80); +INSERT INTO SCORE VALUES(9,3 , 3 , 80); +INSERT INTO SCORE VALUES(10,4 , 1 , 50); +INSERT INTO SCORE VALUES(11,4 , 2, 30); +INSERT INTO SCORE VALUES(12,4, 3 , 20); +INSERT INTO SCORE VALUES(13,5 , 1, 76); +INSERT INTO SCORE VALUES(14,5, 2, 87); +INSERT INTO SCORE VALUES(15,6 , 1, 31); +INSERT INTO SCORE VALUES(16,6 , 3, 34); +INSERT INTO SCORE VALUES(17,7 , 2 , 89); +INSERT INTO SCORE VALUES(18,7, 3 , 98); + + + + + + + + + +- 练习题目: + +-- 1.查询"数学 2"课程比" 语文1 "课程成绩高的学生的信息及课程分数 +SELECT * FROM STUDENT JOIN +( +SELECT A.SCORE AS 数学,B.SCORE AS 语文,A.STUDENT_ID FROM +(SELECT * FROM SCORE WHERE COURSE_ID=2)A, +(SELECT * FROM SCORE WHERE COURSE_ID=1)B +WHERE A.SCORE>B.SCORE AND A.STUDENT_ID=B.STUDENT_ID +)BIAO +ON STUDENT.ID=BIAO.STUDENT_ID + +-- 1.1 查询同时存在" 数学 "课程和" 语文 "课程的情况 +SELECT A.STUDENT_ID AS 学生编号,A.COURSE_ID AS 语文,B.COURSE_ID AS 数学,A.SCORE AS 语文成绩,B.SCORE AS 数学成绩 FROM + (SELECT * FROM SCORE WHERE COURSE_ID=1)A, + (SELECT * FROM SCORE WHERE COURSE_ID=2)B +WHERE A.STUDENT_ID=B.STUDENT_ID AND A.COURSE_ID IS NOT NULL AND B.COURSE_ID IS NOT NULL + +-- 1.2 查询存在" 数学 "课程但可能不存在" 语文 "课程的情况(不存在时显示为 null ) +SELECT SX.STUDENT_ID AS 学生编号, YW.COURSE_ID AS 语文,SX.COURSE_ID AS 数学, YW.SCORE AS 语文成绩,SX.SCORE AS 数学成绩 FROM + (SELECT * FROM SCORE WHERE COURSE_ID=1) YW +RIGHT JOIN + (SELECT * FROM SCORE WHERE COURSE_ID=2) SX + ON YW.STUDENT_ID=SX.STUDENT_ID + +-- 1.3 查询不存在" 数学 "课程但存在" 语文 "课程的情况 +SELECT YW.STUDENT_ID, YW.COURSE_ID AS 语文,SX.COURSE_ID AS 数学,YW.SCORE AS 语文成绩,SX.SCORE AS 数学成绩 FROM + (SELECT * FROM SCORE WHERE COURSE_ID=1)YW +LEFT JOIN + (SELECT * FROM SCORE WHERE COURSE_ID=2)SX +ON YW.STUDENT_ID=SX.STUDENT_ID + +-- 2.查询平均成绩大于等于 60 分的同学的学生编号和学生姓名和平均成绩 + +select student.id,student.student_name, 平均成绩 from student join +(SELECT STUDENT_ID, AVG(SCORE)AS 平均成绩 FROM SCORE GROUP BY STUDENT_id HAVING avg(score)>=60)b +on student.id=b.student_id +order by student_id + + +-- 3.查询在 成绩 表存在成绩的学生信息 + +-- 4.查询所有同学的学生编号、学生姓名、选课总数、所有课程的总成绩(没成绩的显示为 null ) + +-- 4.1 查有成绩的学生信息 + +-- 5.查询「李」姓老师的数量 + +SELECT count(TEACHER_NAME) AS 数量 FROM TEACHER WHERE TEACHER_NAME LIKE '李%' + +-- 6.查询学过「张三」(教数学2)老师授课的同学的信息 + +-- 7.查询没有学全所有课程的同学的信息 + +-- 8.查询至少有一门课与学号为" 01 "的同学所学相同的同学的信息 + +-- 9.查询和" 01 "号的同学学习的课程 完全相同的其他同学的信息 + +-- 10.查询没学过"张三"老师讲授的任一门课程的学生姓名 + +-- 11.查询两门及其以上不及格课程的同学的学号,姓名及其平均成绩 + +-- 12.检索" 数学 "课程分数小于 60,按分数降序排列的学生信息 + +-- 13.按平均成绩从高到低显示所有学生的所有课程的成绩以及平均成绩 + +-- 14.查询各科成绩最高分、最低分和平均分: + +-- 15.以如下形式显示:课程 ID,课程 name,最高分,最低分,平均分,及格率,中等率,优良率,优秀率 +/* + 及格为>=60,中等为:70-80,优良为:80-90,优秀为:>=90 + + 要求输出课程号和选修人数,查询结果按人数降序排列,若人数相同,按课程号升序排列 + + 按各科成绩进行排序,并显示排名, Score 重复时保留名次空缺 +*/ + +-- 15.1 按各科成绩进行排序,并显示排名, Score 重复时合并名次 + +-- 16.查询学生的总成绩,并进行排名,总分重复时保留名次空缺 + +-- 16.1 查询学生的总成绩,并进行排名,总分重复时不保留名次空缺 + +-- 17.统计各科成绩各分数段人数:课程编号,课程名称,[100-85],[85-70],[70-60],[60-0] 及所占百分比 + +-- 18.查询各科成绩前三名的记录 + +-- 19.查询每门课程被选修的学生数 + +-- 20.查询出只选修两门课程的学生学号和姓名 + +-- 21.查询男生、女生人数 + +-- 22.查询名字中含有「风」字的学生信息 + +-- 23.查询同名同性学生名单,并统计同名人数 + +-- 24.查询 1990 年出生的学生名单 + +-- 25.查询每门课程的平均成绩,结果按平均成绩降序排列,平均成绩相同时,按课程编号升序排列 + +-- 26.查询平均成绩大于等于 85 的所有学生的学号、姓名和平均成绩 + +-- 27.查询课程名称为「数学」,且分数低于 60 的学生姓名和分数 + +-- 28.查询所有学生的课程及分数情况(存在学生没成绩,没选课的情况) + +-- 29.查询任何一门课程成绩在 70 分以上的姓名、课程名称和分数 + +-- 30.查询不及格的课程 + +-- 31.查询课程编号为 01 且课程成绩在 80 分以上的学生的学号和姓名 + +-- 32.求每门课程的学生人数 + +-- 33.成绩不重复,查询选修「张三」老师所授课程的学生中,成绩最高的学生信息及其成绩 + +--34.成绩有重复的情况下,查询选修「张三」老师所授课程的学生中,成绩最高的学生信息及其成绩 + +-- 35.查询不同课程成绩相同的学生的学生编号、课程编号、学生成绩 + +-- 36.查询每门功成绩最好的前两名 + +-- 37.统计每门课程的学生选修人数(超过 5 人的课程才统计)。 + +-- 38.检索至少选修两门课程的学生学号 + +-- 39.查询选修了全部课程的学生信息 + +-- 40.查询各学生的年龄,只按年份来算 + +-- 41.按照出生日期来算,当前月日 < 出生年月的月日则,年龄减一 + +-- 42.查询本周过生日的学生 + +-- 43.查询下周过生日的学生 + +-- 44.查询本月过生日的学生 + +-- 45.查询下月过生日的学生 \ No newline at end of file -- Gitee From 46a43485c55f7d616bf63fcb24882a0146884c31 Mon Sep 17 00:00:00 2001 From: Your Name Date: Fri, 9 Jul 2021 11:36:03 +0800 Subject: [PATCH 2/2] sql --- fyt.sql | 242 ++++++++++++++++++++++++++++++++------------------- fyt.~sql | 258 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 412 insertions(+), 88 deletions(-) create mode 100644 fyt.~sql diff --git a/fyt.sql b/fyt.sql index f5470f3..9de8b8a 100644 --- a/fyt.sql +++ b/fyt.sql @@ -1,28 +1,63 @@ --- 学生信息 -INSERT INTO STUDENT VALUES(01 , '赵雷' , to_date('1990-01-01','YYYY-MM-DD') , 'm'); -INSERT INTO STUDENT VALUES(02 , '钱电' , to_date('1990-12-21','YYYY-MM-DD') , 'm'); -INSERT INTO STUDENT VALUES(03 , '孙风' , to_date('1990-12-20','YYYY-MM-DD') , 'm'); -INSERT INTO STUDENT VALUES(04 , '李云' , to_date('1990-12-06','YYYY-MM-DD') , 'm'); -INSERT INTO STUDENT VALUES(05 , '周梅' , to_date('1991-12-01','YYYY-MM-DD') , 'f'); -INSERT INTO STUDENT VALUES(06 , '吴兰' , to_date('1992-01-01','YYYY-MM-DD') , 'f'); -INSERT INTO STUDENT VALUES(07 , '郑彭' , to_date('1989-01-01','YYYY-MM-DD') , 'f'); -INSERT INTO STUDENT VALUES(09 , '张三' , to_date('2017-12-20','YYYY-MM-DD') , 'f'); -INSERT INTO STUDENT VALUES(10 , '李四' , to_date('2017-12-25','YYYY-MM-DD') , 'f'); -INSERT INTO STUDENT VALUES(11 , '李四' , to_date('2012-06-06','YYYY-MM-DD') , 'f'); -INSERT INTO STUDENT VALUES(12 , '赵六' , to_date('2013-06-13','YYYY-MM-DD') , 'f'); -INSERT INTO STUDENT VALUES(13 , '孙七' , to_date('2014-06-01','YYYY-MM-DD') , 'f'); - --- 课程信息 -INSERT INTO COURSE VALUES(01 , '语文' , 02); -INSERT INTO COURSE VALUES(02 , '数学' , 01); -INSERT INTO COURSE VALUES(03 , '英语' , 03); - --- 教师信息 -INSERT INTO TEACHER VALUES(01 , '张三'); -INSERT INTO TEACHER VALUES(02 , '李四'); -INSERT INTO TEACHER VALUES(03 , '王五'); - --- 成绩 +-- ѧ +CREATE TABLE STUDENT +( + ID INT PRIMARY KEY NOT NULL, + STUDENT_NAME VARCHAR2(80), + BIRTHDAY DATE, + SEX VARCHAR2(2) +); +-- γ̱ +CREATE TABLE COURSE +( + ID INT PRIMARY KEY NOT NULL, + COURSE_NAME VARCHAR2(80), + TEACHER_ID INT +); +-- ʦ +CREATE TABLE TEACHER +( + ID INT PRIMARY KEY NOT NULL, + TEACHER_NAME VARCHAR2(80) +); +-- ɼ +CREATE TABLE SCORE +( + ID INT PRIMARY KEY NOT NULL, + STUDENT_ID INT, + COURSE_ID INT, + SCORE INT +); + + + + + + +-- ѧϢ +INSERT INTO STUDENT VALUES(01 , '' , to_date('1990-01-01','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(02 , 'Ǯ' , to_date('1990-12-21','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(03 , '' , to_date('1990-12-20','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(04 , '' , to_date('1990-12-06','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(05 , '÷' , to_date('1991-12-01','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(06 , '' , to_date('1992-01-01','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(07 , '֣' , to_date('1989-01-01','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(09 , '' , to_date('2017-12-20','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(10 , '' , to_date('2017-12-25','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(11 , '' , to_date('2012-06-06','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(12 , '' , to_date('2013-06-13','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(13 , '' , to_date('2014-06-01','YYYY-MM-DD') , 'f'); + +-- γϢ +INSERT INTO COURSE VALUES(01 , '' , 02); +INSERT INTO COURSE VALUES(02 , 'ѧ' , 01); +INSERT INTO COURSE VALUES(03 , 'Ӣ' , 03); + +-- ʦϢ +INSERT INTO TEACHER VALUES(01 , ''); +INSERT INTO TEACHER VALUES(02 , ''); +INSERT INTO TEACHER VALUES(03 , ''); + +-- ɼ INSERT INTO SCORE VALUES(1,1 , 1 , 80); INSERT INTO SCORE VALUES(2,1 , 2 , 90); INSERT INTO SCORE VALUES(3,1 , 3 , 99); @@ -50,143 +85,174 @@ INSERT INTO SCORE VALUES(18,7, 3 , 98); -- 练习题目: +- ϰĿ --- 1.查询"数学 2"课程比" 语文1 "课程成绩高的学生的信息及课程分数 +-- 1.ѯ"ѧ 2"γ̱" 1 "γ̳ɼߵѧϢγ̷ SELECT * FROM STUDENT JOIN ( -SELECT A.SCORE AS 数学,B.SCORE AS 语文,A.STUDENT_ID FROM +SELECT A.STUDENT_ID A.SCORE AS ѧ,B.SCORE AS FROM (SELECT * FROM SCORE WHERE COURSE_ID=2)A, (SELECT * FROM SCORE WHERE COURSE_ID=1)B WHERE A.SCORE>B.SCORE AND A.STUDENT_ID=B.STUDENT_ID )BIAO ON STUDENT.ID=BIAO.STUDENT_ID --- 1.1 查询同时存在" 数学 "课程和" 语文 "课程的情况 -SELECT A.STUDENT_ID AS 学生编号,A.COURSE_ID AS 语文,B.COURSE_ID AS 数学,A.SCORE AS 语文成绩,B.SCORE AS 数学成绩 FROM +-- 1.1 ѯͬʱ" ѧ "γ̺" "γ̵ +SELECT A.STUDENT_ID AS ѧ,A.COURSE_ID AS ,B.COURSE_ID AS ѧ,A.SCORE AS ijɼ,B.SCORE AS ѧɼ FROM (SELECT * FROM SCORE WHERE COURSE_ID=1)A, (SELECT * FROM SCORE WHERE COURSE_ID=2)B WHERE A.STUDENT_ID=B.STUDENT_ID AND A.COURSE_ID IS NOT NULL AND B.COURSE_ID IS NOT NULL --- 1.2 查询存在" 数学 "课程但可能不存在" 语文 "课程的情况(不存在时显示为 null ) -SELECT SX.STUDENT_ID AS 学生编号, YW.COURSE_ID AS 语文,SX.COURSE_ID AS 数学, YW.SCORE AS 语文成绩,SX.SCORE AS 数学成绩 FROM +-- 1.2 ѯ" ѧ "γ̵ܲ" "γ̵(ʱʾΪ null ) +SELECT SX.STUDENT_ID AS ѧ, YW.COURSE_ID AS ,SX.COURSE_ID AS ѧ, YW.SCORE AS ijɼ,SX.SCORE AS ѧɼ FROM (SELECT * FROM SCORE WHERE COURSE_ID=1) YW RIGHT JOIN (SELECT * FROM SCORE WHERE COURSE_ID=2) SX ON YW.STUDENT_ID=SX.STUDENT_ID --- 1.3 查询不存在" 数学 "课程但存在" 语文 "课程的情况 -SELECT YW.STUDENT_ID, YW.COURSE_ID AS 语文,SX.COURSE_ID AS 数学,YW.SCORE AS 语文成绩,SX.SCORE AS 数学成绩 FROM +-- 1.3 ѯ" ѧ "γ̵" "γ̵ +SELECT YW.STUDENT_ID, YW.COURSE_ID AS ,SX.COURSE_ID AS ѧ,YW.SCORE AS ijɼ,SX.SCORE AS ѧɼ FROM (SELECT * FROM SCORE WHERE COURSE_ID=1)YW LEFT JOIN (SELECT * FROM SCORE WHERE COURSE_ID=2)SX ON YW.STUDENT_ID=SX.STUDENT_ID --- 2.查询平均成绩大于等于 60 分的同学的学生编号和学生姓名和平均成绩 +-- 2.ѯƽɼڵ 60 ֵͬѧѧźѧƽɼ -select student.id,student.student_name, 平均成绩 from student join -(SELECT STUDENT_ID, AVG(SCORE)AS 平均成绩 FROM SCORE GROUP BY STUDENT_id HAVING avg(score)>=60)b +select student.id,student.student_name, ƽɼ from student join +(SELECT STUDENT_ID, AVG(SCORE)AS ƽɼ FROM SCORE GROUP BY STUDENT_id HAVING avg(score)>=60)b on student.id=b.student_id order by student_id --- 3.查询在 成绩 表存在成绩的学生信息 +-- 3.ѯ ɼ ڳɼѧϢ +SELECT * FROM STUDENT JOIN +(SELECT * FROM SCORE WHERE SCORE IS NOT NULL)A +ON STUDENT.ID=A.STUDENT_ID --- 4.查询所有同学的学生编号、学生姓名、选课总数、所有课程的总成绩(没成绩的显示为 null ) +-- 4.ѯͬѧѧšѧѡпγ̵ܳɼ(ûɼʾΪ null ) +SELECT ID AS ѧ,STUDENT_NAME AS ѧ,ѡܳɼ FROM STUDENT JOIN +(SELECT STUDENT_ID, COUNT(COURSE_ID) AS ѡ,SUM(SCORE) AS ܳɼ FROM SCORE GROUP BY STUDENT_ID ORDER BY STUDENT_ID)A +ON STUDENT.ID=A.STUDENT_ID --- 4.1 查有成绩的学生信息 +-- 4.1 гɼѧϢ +SELECT * FROM STUDENT JOIN +(SELECT * FROM SCORE WHERE SCORE IS NOT NULL)A +ON STUDENT.ID=A.STUDENT_ID + +-- 5.ѯʦ --- 5.查询「李」姓老师的数量 +SELECT count(TEACHER_NAME) AS ʦ FROM TEACHER WHERE TEACHER_NAME LIKE '%' -SELECT count(TEACHER_NAME) AS 数量 FROM TEACHER WHERE TEACHER_NAME LIKE '李%' +-- 6.ѯѧ(ѧ2)ʦڿεͬѧϢ --- 6.查询学过「张三」(教数学2)老师授课的同学的信息 +SELECT STUDENT.ID,STUDENT.STUDENT_NAME,STUDENT.BIRTHDAY,STUDENT.SEX, TEACHER.TEACHER_NAME,COURSE.COURSE_NAME FROM STUDENT,COURSE,TEACHER,SCORE +WHERE STUDENT.ID=SCORE.STUDENT_ID +AND COURSE.TEACHER_ID=TEACHER.ID +AND TEACHER.TEACHER_NAME IN '' +AND SCORE.COURSE_ID=2 --- 7.查询没有学全所有课程的同学的信息 +-- 7.ѯûѧȫпγ̵ͬѧϢ --- 8.查询至少有一门课与学号为" 01 "的同学所学相同的同学的信息 +-- 8.ѯһſѧΪ" 01 "ͬѧѧͬͬѧϢ --- 9.查询和" 01 "号的同学学习的课程 完全相同的其他同学的信息 +-- 9.ѯ" 01 "ŵͬѧѧϰĿγ ȫͬͬѧϢ --- 10.查询没学过"张三"老师讲授的任一门课程的学生姓名 +-- 10.ѯûѧ""ʦڵһſγ̵ѧ --- 11.查询两门及其以上不及格课程的同学的学号,姓名及其平均成绩 +-- 11.ѯżϲγ̵ͬѧѧţƽɼ --- 12.检索" 数学 "课程分数小于 60,按分数降序排列的学生信息 +-- 12." ѧ "γ̷С 60еѧϢ --- 13.按平均成绩从高到低显示所有学生的所有课程的成绩以及平均成绩 +-- 13.ƽɼӸߵʾѧпγ̵ijɼԼƽɼ --- 14.查询各科成绩最高分、最低分和平均分: +-- 14.ѯƳɼ߷֡ͷֺƽ֣ +select course_id as γ̱,max(score)as ߷,min(score) as ͷ,avg(score)as ƽ from score group by course_id --- 15.以如下形式显示:课程 ID,课程 name,最高分,最低分,平均分,及格率,中等率,优良率,优秀率 +-- 15.ʽʾγ IDγ name߷֣ͷ֣ƽ֣ʣеʣʣ /* - 及格为>=60,中等为:70-80,优良为:80-90,优秀为:>=90 + Ϊ>=60еΪ70-80Ϊ80-90Ϊ>=90 - 要求输出课程号和选修人数,查询结果按人数降序排列,若人数相同,按课程号升序排列 + Ҫγ̺źѡѯУͬγ̺ - 按各科成绩进行排序,并显示排名, Score 重复时保留名次空缺 + Ƴɼ򣬲ʾ Score ظʱοȱ */ --- 15.1 按各科成绩进行排序,并显示排名, Score 重复时合并名次 +-- 15.1 Ƴɼ򣬲ʾ Score ظʱϲ --- 16.查询学生的总成绩,并进行排名,总分重复时保留名次空缺 +-- 16.ѯѧܳɼܷظʱοȱ +SELECT STUDENT_ID AS ѧ,SUM(SCORE)AS ܳɼ FROM SCORE GROUP BY STUDENT_ID ORDER BY ܳɼ DESC --- 16.1 查询学生的总成绩,并进行排名,总分重复时不保留名次空缺 +-- 16.1 ѯѧܳɼܷظʱοȱ --- 17.统计各科成绩各分数段人数:课程编号,课程名称,[100-85],[85-70],[70-60],[60-0] 及所占百分比 +-- 17.ͳƸƳɼγ̱ţγƣ[100-85][85-70][70-60][60-0] ռٷֱ --- 18.查询各科成绩前三名的记录 +-- 18.ѯƳɼǰļ¼ --- 19.查询每门课程被选修的学生数 +-- 19.ѯÿſγ̱ѡ޵ѧ +SELECT * FROM +(SELECT COUNT(STUDENT_ID)AS ѡĿγѧ FROM SCORE WHERE COURSE_ID=1 )A, +(SELECT COUNT(STUDENT_ID)AS ѡѧγѧ FROM SCORE WHERE COURSE_ID=2)B, +(SELECT COUNT(STUDENT_ID)AS ѡӢγѧ FROM SCORE WHERE COURSE_ID=3)C --- 20.查询出只选修两门课程的学生学号和姓名 - --- 21.查询男生、女生人数 +-- 20.ѯֻѡſγ̵ѧѧź + +SELECT ID AS ѧ,STUDENT.STUDENT_NAME AS ѧ,γ FROM STUDENT + JOIN +(SELECT COUNT(COURSE_ID)AS γ,STUDENT_ID FROM SCORE GROUP BY STUDENT_ID)A + ON STUDENT.ID=A.STUDENT_ID +WHERE A.γ=2 ORDER BY STUDENT.ID --- 22.查询名字中含有「风」字的学生信息 +-- 21.ѯŮ +SELECT * FROM + (SELECT COUNT(SEX) AS FROM STUDENT WHERE SEX IN 'm')A, + (SELECT COUNT(SEX) AS Ů FROM STUDENT WHERE SEX IN 'f')B + +-- 22.ѯкС硹ֵѧϢ +SELECT * FROM STUDENT WHERE STUDENT_NAME LIKE '%%' --- 23.查询同名同性学生名单,并统计同名人数 +-- 23.ѯͬͬѧͳͬ --- 24.查询 1990 年出生的学生名单 +-- 24.ѯ 1990 ѧ --- 25.查询每门课程的平均成绩,结果按平均成绩降序排列,平均成绩相同时,按课程编号升序排列 +-- 25.ѯÿſγ̵ƽɼƽɼУƽɼͬʱγ̱ --- 26.查询平均成绩大于等于 85 的所有学生的学号、姓名和平均成绩 +-- 26.ѯƽɼڵ 85 ѧѧšƽɼ --- 27.查询课程名称为「数学」,且分数低于 60 的学生姓名和分数 +-- 27.ѯγΪѧҷ 60 ѧͷ --- 28.查询所有学生的课程及分数情况(存在学生没成绩,没选课的情况) +-- 28.ѯѧĿγ̼ѧûɼûѡε --- 29.查询任何一门课程成绩在 70 分以上的姓名、课程名称和分数 +-- 29.ѯκһſγ̳ɼ 70 ϵγƺͷ --- 30.查询不及格的课程 +-- 30.ѯĿγ --- 31.查询课程编号为 01 且课程成绩在 80 分以上的学生的学号和姓名 +-- 31.ѯγ̱Ϊ 01 ҿγ̳ɼ 80 ϵѧѧź --- 32.求每门课程的学生人数 +-- 32.ÿſγ̵ѧ --- 33.成绩不重复,查询选修「张三」老师所授课程的学生中,成绩最高的学生信息及其成绩 +-- 33.ɼظѯѡޡʦڿγ̵ѧУɼߵѧϢɼ ---34.成绩有重复的情况下,查询选修「张三」老师所授课程的学生中,成绩最高的学生信息及其成绩 +--34.ɼظ£ѯѡޡʦڿγ̵ѧУɼߵѧϢɼ --- 35.查询不同课程成绩相同的学生的学生编号、课程编号、学生成绩 +-- 35.ѯͬγ̳ɼͬѧѧšγ̱šѧɼ --- 36.查询每门功成绩最好的前两名 +-- 36.ѯÿŹɼõǰ --- 37.统计每门课程的学生选修人数(超过 5 人的课程才统计)。 +-- 37.ͳÿſγ̵ѧѡ 5 ˵Ŀγ̲ͳƣ --- 38.检索至少选修两门课程的学生学号 +-- 38.ѡſγ̵ѧѧ --- 39.查询选修了全部课程的学生信息 +-- 39.ѯѡȫγ̵ѧϢ --- 40.查询各学生的年龄,只按年份来算 +-- 40.ѯѧ䣬ֻ --- 41.按照出生日期来算,当前月日 < 出生年月的月日则,年龄减一 +-- 41.ճ㣬ǰ < µһ --- 42.查询本周过生日的学生 +-- 42.ѯܹյѧ --- 43.查询下周过生日的学生 +-- 43.ѯܹյѧ --- 44.查询本月过生日的学生 +-- 44.ѯ¹յѧ --- 45.查询下月过生日的学生 \ No newline at end of file +-- 45.ѯ¹յѧ diff --git a/fyt.~sql b/fyt.~sql new file mode 100644 index 0000000..9de8b8a --- /dev/null +++ b/fyt.~sql @@ -0,0 +1,258 @@ +-- ѧ +CREATE TABLE STUDENT +( + ID INT PRIMARY KEY NOT NULL, + STUDENT_NAME VARCHAR2(80), + BIRTHDAY DATE, + SEX VARCHAR2(2) +); +-- γ̱ +CREATE TABLE COURSE +( + ID INT PRIMARY KEY NOT NULL, + COURSE_NAME VARCHAR2(80), + TEACHER_ID INT +); +-- ʦ +CREATE TABLE TEACHER +( + ID INT PRIMARY KEY NOT NULL, + TEACHER_NAME VARCHAR2(80) +); +-- ɼ +CREATE TABLE SCORE +( + ID INT PRIMARY KEY NOT NULL, + STUDENT_ID INT, + COURSE_ID INT, + SCORE INT +); + + + + + + +-- ѧϢ +INSERT INTO STUDENT VALUES(01 , '' , to_date('1990-01-01','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(02 , 'Ǯ' , to_date('1990-12-21','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(03 , '' , to_date('1990-12-20','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(04 , '' , to_date('1990-12-06','YYYY-MM-DD') , 'm'); +INSERT INTO STUDENT VALUES(05 , '÷' , to_date('1991-12-01','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(06 , '' , to_date('1992-01-01','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(07 , '֣' , to_date('1989-01-01','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(09 , '' , to_date('2017-12-20','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(10 , '' , to_date('2017-12-25','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(11 , '' , to_date('2012-06-06','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(12 , '' , to_date('2013-06-13','YYYY-MM-DD') , 'f'); +INSERT INTO STUDENT VALUES(13 , '' , to_date('2014-06-01','YYYY-MM-DD') , 'f'); + +-- γϢ +INSERT INTO COURSE VALUES(01 , '' , 02); +INSERT INTO COURSE VALUES(02 , 'ѧ' , 01); +INSERT INTO COURSE VALUES(03 , 'Ӣ' , 03); + +-- ʦϢ +INSERT INTO TEACHER VALUES(01 , ''); +INSERT INTO TEACHER VALUES(02 , ''); +INSERT INTO TEACHER VALUES(03 , ''); + +-- ɼ +INSERT INTO SCORE VALUES(1,1 , 1 , 80); +INSERT INTO SCORE VALUES(2,1 , 2 , 90); +INSERT INTO SCORE VALUES(3,1 , 3 , 99); +INSERT INTO SCORE VALUES(4,2 , 1 , 70); +INSERT INTO SCORE VALUES(5,2 , 2 , 60); +INSERT INTO SCORE VALUES(6,2 , 3 , 80); +INSERT INTO SCORE VALUES(7,3 , 1 , 80); +INSERT INTO SCORE VALUES(8,3 , 2 , 80); +INSERT INTO SCORE VALUES(9,3 , 3 , 80); +INSERT INTO SCORE VALUES(10,4 , 1 , 50); +INSERT INTO SCORE VALUES(11,4 , 2, 30); +INSERT INTO SCORE VALUES(12,4, 3 , 20); +INSERT INTO SCORE VALUES(13,5 , 1, 76); +INSERT INTO SCORE VALUES(14,5, 2, 87); +INSERT INTO SCORE VALUES(15,6 , 1, 31); +INSERT INTO SCORE VALUES(16,6 , 3, 34); +INSERT INTO SCORE VALUES(17,7 , 2 , 89); +INSERT INTO SCORE VALUES(18,7, 3 , 98); + + + + + + + + + +- ϰĿ + +-- 1.ѯ"ѧ 2"γ̱" 1 "γ̳ɼߵѧϢγ̷ +SELECT * FROM STUDENT JOIN +( +SELECT A.STUDENT_ID A.SCORE AS ѧ,B.SCORE AS FROM +(SELECT * FROM SCORE WHERE COURSE_ID=2)A, +(SELECT * FROM SCORE WHERE COURSE_ID=1)B +WHERE A.SCORE>B.SCORE AND A.STUDENT_ID=B.STUDENT_ID +)BIAO +ON STUDENT.ID=BIAO.STUDENT_ID + +-- 1.1 ѯͬʱ" ѧ "γ̺" "γ̵ +SELECT A.STUDENT_ID AS ѧ,A.COURSE_ID AS ,B.COURSE_ID AS ѧ,A.SCORE AS ijɼ,B.SCORE AS ѧɼ FROM + (SELECT * FROM SCORE WHERE COURSE_ID=1)A, + (SELECT * FROM SCORE WHERE COURSE_ID=2)B +WHERE A.STUDENT_ID=B.STUDENT_ID AND A.COURSE_ID IS NOT NULL AND B.COURSE_ID IS NOT NULL + +-- 1.2 ѯ" ѧ "γ̵ܲ" "γ̵(ʱʾΪ null ) +SELECT SX.STUDENT_ID AS ѧ, YW.COURSE_ID AS ,SX.COURSE_ID AS ѧ, YW.SCORE AS ijɼ,SX.SCORE AS ѧɼ FROM + (SELECT * FROM SCORE WHERE COURSE_ID=1) YW +RIGHT JOIN + (SELECT * FROM SCORE WHERE COURSE_ID=2) SX + ON YW.STUDENT_ID=SX.STUDENT_ID + +-- 1.3 ѯ" ѧ "γ̵" "γ̵ +SELECT YW.STUDENT_ID, YW.COURSE_ID AS ,SX.COURSE_ID AS ѧ,YW.SCORE AS ijɼ,SX.SCORE AS ѧɼ FROM + (SELECT * FROM SCORE WHERE COURSE_ID=1)YW +LEFT JOIN + (SELECT * FROM SCORE WHERE COURSE_ID=2)SX +ON YW.STUDENT_ID=SX.STUDENT_ID + +-- 2.ѯƽɼڵ 60 ֵͬѧѧźѧƽɼ + +select student.id,student.student_name, ƽɼ from student join +(SELECT STUDENT_ID, AVG(SCORE)AS ƽɼ FROM SCORE GROUP BY STUDENT_id HAVING avg(score)>=60)b +on student.id=b.student_id +order by student_id + + +-- 3.ѯ ɼ ڳɼѧϢ +SELECT * FROM STUDENT JOIN +(SELECT * FROM SCORE WHERE SCORE IS NOT NULL)A +ON STUDENT.ID=A.STUDENT_ID + +-- 4.ѯͬѧѧšѧѡпγ̵ܳɼ(ûɼʾΪ null ) +SELECT ID AS ѧ,STUDENT_NAME AS ѧ,ѡܳɼ FROM STUDENT JOIN +(SELECT STUDENT_ID, COUNT(COURSE_ID) AS ѡ,SUM(SCORE) AS ܳɼ FROM SCORE GROUP BY STUDENT_ID ORDER BY STUDENT_ID)A +ON STUDENT.ID=A.STUDENT_ID + +-- 4.1 гɼѧϢ +SELECT * FROM STUDENT JOIN +(SELECT * FROM SCORE WHERE SCORE IS NOT NULL)A +ON STUDENT.ID=A.STUDENT_ID + +-- 5.ѯʦ + +SELECT count(TEACHER_NAME) AS ʦ FROM TEACHER WHERE TEACHER_NAME LIKE '%' + +-- 6.ѯѧ(ѧ2)ʦڿεͬѧϢ + +SELECT STUDENT.ID,STUDENT.STUDENT_NAME,STUDENT.BIRTHDAY,STUDENT.SEX, TEACHER.TEACHER_NAME,COURSE.COURSE_NAME FROM STUDENT,COURSE,TEACHER,SCORE +WHERE STUDENT.ID=SCORE.STUDENT_ID +AND COURSE.TEACHER_ID=TEACHER.ID +AND TEACHER.TEACHER_NAME IN '' +AND SCORE.COURSE_ID=2 + +-- 7.ѯûѧȫпγ̵ͬѧϢ + +-- 8.ѯһſѧΪ" 01 "ͬѧѧͬͬѧϢ + +-- 9.ѯ" 01 "ŵͬѧѧϰĿγ ȫͬͬѧϢ + +-- 10.ѯûѧ""ʦڵһſγ̵ѧ + +-- 11.ѯżϲγ̵ͬѧѧţƽɼ + +-- 12." ѧ "γ̷С 60еѧϢ + +-- 13.ƽɼӸߵʾѧпγ̵ijɼԼƽɼ + +-- 14.ѯƳɼ߷֡ͷֺƽ֣ +select course_id as γ̱,max(score)as ߷,min(score) as ͷ,avg(score)as ƽ from score group by course_id + +-- 15.ʽʾγ IDγ name߷֣ͷ֣ƽ֣ʣеʣʣ +/* + Ϊ>=60еΪ70-80Ϊ80-90Ϊ>=90 + + Ҫγ̺źѡѯУͬγ̺ + + Ƴɼ򣬲ʾ Score ظʱοȱ +*/ + +-- 15.1 Ƴɼ򣬲ʾ Score ظʱϲ + +-- 16.ѯѧܳɼܷظʱοȱ +SELECT STUDENT_ID AS ѧ,SUM(SCORE)AS ܳɼ FROM SCORE GROUP BY STUDENT_ID ORDER BY ܳɼ DESC + +-- 16.1 ѯѧܳɼܷظʱοȱ + +-- 17.ͳƸƳɼγ̱ţγƣ[100-85][85-70][70-60][60-0] ռٷֱ + +-- 18.ѯƳɼǰļ¼ + +-- 19.ѯÿſγ̱ѡ޵ѧ +SELECT * FROM +(SELECT COUNT(STUDENT_ID)AS ѡĿγѧ FROM SCORE WHERE COURSE_ID=1 )A, +(SELECT COUNT(STUDENT_ID)AS ѡѧγѧ FROM SCORE WHERE COURSE_ID=2)B, +(SELECT COUNT(STUDENT_ID)AS ѡӢγѧ FROM SCORE WHERE COURSE_ID=3)C + +-- 20.ѯֻѡſγ̵ѧѧź + +SELECT ID AS ѧ,STUDENT.STUDENT_NAME AS ѧ,γ FROM STUDENT + JOIN +(SELECT COUNT(COURSE_ID)AS γ,STUDENT_ID FROM SCORE GROUP BY STUDENT_ID)A + ON STUDENT.ID=A.STUDENT_ID +WHERE A.γ=2 ORDER BY STUDENT.ID + +-- 21.ѯŮ +SELECT * FROM + (SELECT COUNT(SEX) AS FROM STUDENT WHERE SEX IN 'm')A, + (SELECT COUNT(SEX) AS Ů FROM STUDENT WHERE SEX IN 'f')B + +-- 22.ѯкС硹ֵѧϢ +SELECT * FROM STUDENT WHERE STUDENT_NAME LIKE '%%' + +-- 23.ѯͬͬѧͳͬ + +-- 24.ѯ 1990 ѧ + +-- 25.ѯÿſγ̵ƽɼƽɼУƽɼͬʱγ̱ + +-- 26.ѯƽɼڵ 85 ѧѧšƽɼ + +-- 27.ѯγΪѧҷ 60 ѧͷ + +-- 28.ѯѧĿγ̼ѧûɼûѡε + +-- 29.ѯκһſγ̳ɼ 70 ϵγƺͷ + +-- 30.ѯĿγ + +-- 31.ѯγ̱Ϊ 01 ҿγ̳ɼ 80 ϵѧѧź + +-- 32.ÿſγ̵ѧ + +-- 33.ɼظѯѡޡʦڿγ̵ѧУɼߵѧϢɼ + +--34.ɼظ£ѯѡޡʦڿγ̵ѧУɼߵѧϢɼ + +-- 35.ѯͬγ̳ɼͬѧѧšγ̱šѧɼ + +-- 36.ѯÿŹɼõǰ + +-- 37.ͳÿſγ̵ѧѡ 5 ˵Ŀγ̲ͳƣ + +-- 38.ѡſγ̵ѧѧ + +-- 39.ѯѡȫγ̵ѧϢ + +-- 40.ѯѧ䣬ֻ + +-- 41.ճ㣬ǰ < µһ + +-- 42.ѯܹյѧ + +-- 43.ѯܹյѧ + +-- 44.ѯ¹յѧ + +-- 45.ѯ¹յѧ -- Gitee