oracle中 SQL語句 經典練習題

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 建立 student 表

                 

建立score表

                  

建立teacher表

                  

建立grade表

                  

 

--1、 查詢Student表中的所有記錄的Sname、Ssex和Class列。SELECT s.sname, s.ssex, s.class FROM student s --2、 查詢教師所有的單位即不重複的Depart列。SELECT DISTINCT depart FROM teacher --3、 查詢Student表的所有記錄。SELECT * FROM student--4、 查詢Score表中成績在60到80之間的所有記錄。SELECT * FROM score sc WHERE sc.degree BETWEEN 60 AND 80--5、 查詢Score表中成績為85，86或88的記錄。SELECT * FROM score sc WHERE sc.degree IN (85, 86, 88)--6、 查詢Student表中“95031”班或性別為“女”的同學記錄。SELECT * FROM student s WHERE s.ssex=‘女‘ OR s.class=‘95031‘--7、 以Class降序查詢Student表的所有記錄。SELECT * FROM student s ORDER BY s.class DESC--8、 以Cno升序、Degree降序查詢Score表的所有記錄。SELECT * FROM score sc ORDER BY sc.cno, DEGREE DESC--9、 查詢“95031”班的學生人數。SELECT COUNT(*) FROM student s WHERE s.class=‘95031‘--10、查詢Score表中的最高分的學生學號和課程號。SELECT * FROM score sc WHERE sc.degree=(SELECT MAX(DEGREE) FROM score)--ALL--11、查詢‘3-105’號課程的平均分。SELECT sc.cno, AVG(sc.degree) FROM score sc WHERE sc.cno=‘3-105‘ GROUP BY sc.cno--12、查詢Score表中至少有5名學生選修的並以3開頭的課程的平均分數。SELECT sc.cno, AVG(sc.degree) FROM score sc WHERE sc.cno LIKE ‘3%‘ GROUP BY sc.cno HAVING COUNT(sc.cno) >= 5--13、查詢最低分大於70，最高分小於90的Sno列。SELECT * FROM score sc WHERE sc.degree BETWEEN 70 AND 90--14、查詢所有學生的Sname、Cno和Degree列。SELECT s.sname, sc.cno, sc.degree FROM student s LEFT JOIN score sc ON s.sno=sc.snoSELECT s.sname, sc.cno, sc.degree FROM student s, score sc WHERE s.sno=sc.sno--15、查詢所有學生的Sno、Cname和Degree列。SELECT s.sno, (SELECT c.cname FROM course c WHERE c.cno=sc.cno) cname, sc.degree FROM student s LEFT JOIN score sc ON s.sno=sc.sno--16、查詢所有學生的Sname、Cname和Degree列。SELECT s.sname, (SELECT c.cname FROM course c WHERE c.cno=sc.cno) cname, sc.degree FROM student s LEFT JOIN score sc ON s.sno=sc.sno--17、查詢“95033”班所選課程的平均分。SELECT SC.CNO, AVG(SC.DEGREE)  FROM SCORE SC WHERE SC.SNO IN (SELECT SNO FROM STUDENT S WHERE S.CLASS = ‘95033‘) GROUP BY SC.CNO--18、現查詢所有同學的Sno、Cno和rank列。SELECT SC.SNO, SC.CNO, G.RANK  FROM SCORE SC  LEFT JOIN GRADE G    ON SC.DEGREE BETWEEN G.LOW AND G.UPP--19、查詢選修“3-105”課程的成績高於“109”號同學成績的所有同學的記錄。SELECT *  FROM STUDENT S WHERE S.SNO IN       (SELECT SC.SNO          FROM SCORE SC         WHERE SC.CNO = ‘3-105‘           AND SC.DEGREE > ALL         (SELECT DEGREE FROM SCORE SC1 WHERE SC1.SNO = 109))
--20、查詢score中選學一門以上課程的同學中分數為非最高分成績的記錄。

　　SELECT R.SNO, R.DEGREE
　　FROM SCORE R
　　WHERE R.DEGREE NOT IN (SELECT MAX(R.DEGREE) FROM SCORE R GROUP BY R.SNO)
　　AND R.SNO IN
　　(SELECT R.SNO FROM SCORE R GROUP BY R.SNO HAVING COUNT(R.SNO) > 1)

--21、查詢成績高於學號為“109”、課程號為“3-105”的成績的所有記錄。SELECT *  FROM SCORE SC1 WHERE SC1.DEGREE > ANY (SELECT SC.DEGREE          FROM SCORE SC         WHERE SC.SNO = 109           AND SC.CNO = ‘3-105‘) ORDER BY sc1.sno/*       any,all,some的區別*/--22、查詢和學號為108的同學同年出生的所有學生的Sno、Sname和Sbirthday列。SELECT *  FROM STUDENT S WHERE TO_CHAR(S.SBIRTHDAY, ‘yyyy‘) =       (SELECT TO_CHAR(S1.SBIRTHDAY, ‘yyyy‘)          FROM STUDENT S1         WHERE S1.SNO = ‘108‘)   AND S.SNO != ‘108‘--23、查詢“張旭“教師任課的學產生績。SELECT SC.*  FROM COURSE C  LEFT JOIN TEACHER T    ON C.TNO = T.TNO  LEFT JOIN SCORE SC    ON SC.CNO = C.CNO   AND T.TNAME = ‘張旭‘--24、查詢選修某課程的同學人數多於5人的教師姓名。SELECT T.TNAME  FROM COURSE C  LEFT JOIN TEACHER T    ON C.TNO = T.TNO  LEFT JOIN SCORE SC    ON SC.CNO = C.CNO GROUP BY T.TNAMEHAVING COUNT(*) > 5--25、查詢95033班和95031班全體學生的記錄。SELECT * FROM student s WHERE s.class IN (95033, 95031)--26、查詢存在有85分以上成績的課程Cno.SELECT * FROM score sc WHERE sc.degree > 85--27、查詢出“電腦系“教師所教課程的成績表。SELECT *  FROM SCORE SC WHERE SC.CNO IN (SELECT C.CNO                    FROM COURSE C, TEACHER T                   WHERE C.TNO = T.TNO                     AND T.DEPART = ‘電腦系‘)--28、查詢“電腦系”與“電子工程系“不同職稱的教師的Tname和Prof。SELECT T.TNAME, T.PROF  FROM TEACHER T WHERE DEPART = ‘電腦系‘   AND PROF NOT IN (SELECT PROF FROM TEACHER WHERE DEPART = ‘電子工程系‘);--29、查詢選修編號為“3-105“且成績至少高於選修編號為“3-245”的同學的Cno,Sno和Degree並按Degree從高到低次序排序。SELECT *  FROM SCORE WHERE DEGREE > ANY (SELECT DEGREE FROM SCORE WHERE CNO = ‘3-245‘) ORDER BY DEGREE DESC;--30、查詢選修編號為“3-105”且成績高於選修編號為“3-245”的同學的Cno、Sno和Degree.SELECT * FROM SCORE WHERE DEGREE > ALL(SELECT DEGREE FROM SCORE WHERE CNO=‘3-245‘) ORDER BY DEGREE DESC;--31、查詢所有教師和同學的name、sex和birthday.SELECT T.TNAME, T.TSEX, T.TBIRTHDAY  FROM TEACHER TUNION ALLSELECT S.SNAME, S.SSEX, S.SBIRTHDAY  FROM STUDENT S--32、查詢所有“女”教師和“女”同學的name、sex和birthday.SELECT *  FROM (SELECT T.TNAME, T.TSEX, T.TBIRTHDAY          FROM TEACHER T        UNION ALL        SELECT S.SNAME, S.SSEX, S.SBIRTHDAY          FROM STUDENT S) R WHERE R.TSEX = ‘女‘--33、查詢成績比該課程平均成績低的同學的成績表。SELECT *  FROM SCORE SC1,       (SELECT SC.CNO, AVG(SC.DEGREE) AVD FROM SCORE SC GROUP BY SC.CNO) R WHERE SC1.CNO = R.CNO   AND SC1.DEGREE < R.AVD--34、查詢所有任課教師的Tname和Depart.SELECT t.tname, t.depart FROM teacher t--35、查詢所有未講課的教師的Tname和Depart. SELECT *  FROM TEACHER T WHERE T.TNO NOT IN       (SELECT C.TNO          FROM COURSE C         WHERE C.CNO IN (SELECT SC.CNO FROM SCORE SC))--36、查詢至少有2名男生的班號。SELECT s.class FROM student s GROUP BY s.class HAVING COUNT(*) >= 2--37、查詢Student表中不姓“王”的同學記錄。SELECT * FROM student s WHERE s.sname NOT LIKE ‘王%‘--38、查詢Student表中每個學生的姓名和年齡。SELECT s.sname, ROUND((SYSDATE-s.sbirthday)/365) 年齡 FROM student sSELECT s.sname, to_char(SYSDATE, ‘yyyy‘) - to_char(s.sbirthday,‘yyyy‘) FROM student s--39、查詢Student表中最大和最小的Sbirthday日期值。SELECT MAX(s.sbirthday), MIN(s.sbirthday) FROM student s--40、以班號和年齡從大到小的順序查詢Student表中的全部記錄。SELECT * FROM student s ORDER BY s.class DESC, s.sbirthday--41、查詢“男”教師及其所上的課程。SELECT * FROM course c, teacher t WHERE c.tno=t.tno AND t.tsex=‘男‘--42、查詢最高分同學的Sno、Cno和Degree列。SELECT S.SNO, SC.CNO, SC.DEGREE  FROM STUDENT S, SCORE SC WHERE S.SNO = SC.SNO   AND SC.DEGREE = (SELECT MAX(DEGREE) FROM SCORE)--43、查詢和“李軍”同性別的所有同學的Sname.SELECT *  FROM STUDENT S WHERE S.SNAME != ‘李軍‘   AND S.SSEX = (SELECT DISTINCT SSEX FROM STUDENT WHERE SNAME = ‘李軍‘)--44、查詢和“李軍”同性別並同班的同學Sname.SELECT *  FROM STUDENT S WHERE S.SNAME != ‘李軍‘   AND S.SSEX = (SELECT DISTINCT SSEX FROM STUDENT WHERE SNAME = ‘李軍‘)   AND S.CLASS = (SELECT DISTINCT CLASS FROM STUDENT WHERE SNAME = ‘李軍‘)--45、查詢所有選修“電腦導論”課程的“男”同學的成績表SELECT S.SNAME, S.SSEX, SC.*  FROM SCORE SC, COURSE C, STUDENT S WHERE SC.CNO = C.CNO   AND S.SNO = SC.SNO   AND C.CNAME = ‘電腦導論‘   AND S.SSEX = ‘男‘

 

oracle中 SQL語句 經典練習題