Select sno count * from sc group by sno

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August undefined, 2024

Webselect sno,count(sno) from sc group by sno with rollup #显示每个学生参与考试的科目及其科目总数 select sno,group_concat(cno) as '选修科目',count(sno) as '总计' from sc group by sno with rollup. #limit子句 #不指定初始位置 #查询student表前两条记录 select * from student limit 2 #指定初始位置 #查询 ... WebMay 17, 2011 · SELECT s.sname FROM suppliers s INNER JOIN catalogue c ON s.Sno = c.Sno GROUP BY s.sname HAVING COUNT (c.Pno) = (SELECT COUNT (Pno) FROM Parts) …

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Web3、group by子句将数据划分为多个分组； 4、使用聚集函数进行计算； 5、使用having子句筛选分组； 6、计算所有的表达式； 7、使用order by对结果集进行排序。另外:一个查询语句各个部分的执行顺序: --8) SELECT (9) DISTINCT (11) --(1) FROM WebOct 23, 2024 · select distinct cno from SC t 6.5 查询GIS专业学生的学号和姓名. select sno,sname from STUDENT where sdept='GIS' 6.6 查询年龄小于25的学生的学号和姓名. select sno,sname from STUDENT where sage<25 6.7 查询年龄介于20-25之间的学生的学号和姓名. select sno,sname from STUDENT where sage between 20 and 25 qstring replace用法

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WebJan 5, 2016 · SQL> select sno,count(*) from sc where grade>=90 group by sno having count(*)>=2； SNO COUNT(*)----- ----- 1 3 2 2. 这个结果是我们想要的，它列出了具有评选 … Webselect sno, max (parts_sold) from ( SELECT sno, COUNT (pno) as "parts_sold" from SUPPLY group by sno) temp; --g. Obtain the sno, and total quantity of parts supplied by each supplier. select sno , sum (quantity) from SUPPLY group by sno; --h. Retrieve the name and address of suppliers who supply all green colored parts. WebApr 8, 2024 · select * from SC 2 查询计算机系学生的姓名和年龄。 select Sname,Sage from Student where Sdept = '计算机系' 3 查询成绩在70～80分的学生的学号、课程号和成绩。 … qstring rightref

Find the Supplier number for those suppliers who supply …

WebMay 18, 2011 · SELECT s.Sno, s.Sname FROM Suppliers s CROSS JOIN Parts p LEFT JOIN Catalogue c ON s.Sno = c.Sno AND p.Pno = c.Pno GROUP BY s.Sno, s.Sname HAVING COUNT (*) = COUNT (c.Pno) Share Improve this answer Follow answered May 18, 2011 at 16:56 Andriy M 75.5k 17 94 152 Add a comment 0 Try this: WebSELECT sno, AVG(score) AS AVG FROM sc GROUP BY sno HAVING AVG(score) > 60; ... SELECT sc.sno, s.sname, COUNT(sc.cno) AS totalnum, SUM(sc.score) AS totalscore FROM sc, student AS s WHERE sc.sno = s.sno GROUP BY sc.sno;-- ----- -- 4、查询姓“李”的老师的个 … qstring resizeWebMar 29, 2016 · So, that if there is no row with year 2008 then. A name and its count 0 should be shown. Output should be: **name count** name1 2 name2 1 name3 0 name4 0. … qstring rightjustified

"WebOct 6, 2016 · SELECT sc.sno,student.sname FROM sc, student WHERE sc.sno=student.sno GROUP BY sc.sno,student.sname having count(cno)<(SELECT count (cno) FROM course);--11、查询至少有一门课与学号为“s001”的同学所学相同的同学的学号和姓名； SELECT sno,sname FROM student WHERE sno IN(SELECT sno FROM sc WHERE cno " - Select sno count * from sc group by sno

Select sno count * from sc group by sno

WebJun 10, 2024 · INSERT INTO SC SELECT * FROM (SELECT DISTINCT ST.SNO FROM STUDENT ST MINUS SELECT S.SNO FROM SC S WHERE S.CNO='c002') STNO LEFT JOIN (SELECT SC.CNO,AVG(SC.SCORE) FROM SC SC WHERE SC.CNO='c002' GROUP BY SC.CNO) SCC ON 1=1; COMMIT; INSERT INTO SC SELECT STNO.SNO,'c002', (SELECT … Webselect sno,pno from sp order by sno; # The "order by" clause is not strictly necessary. Get supplier numbers for suppliers who supply part 1. Answer should have one attribute, (sno). select sno from sp where pno = 1; Get supplier names and status for all suppliers who have a status between 15 and 25 inclusive.

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Web–(Select Sno from SC Group by Sno Having Count(Sno)>=2) –(5)(难度)查询平均成绩在80分以上(含)的学生的学号和姓名(使用嵌套查询+Group分组子句) –Select Sno,Sname from … WebSELECT sNo, SUM(qty) FROM SPJ GROUP BY sNo; 6. For each supplier, tell the total number of parts supplied to some project. This query is very similar to the above except supplier S006, which doesn’t supply any parts to any project, must be listed. SELECT S.sNo, ISNULL(SUM(qty),0) FROM S LEFT OUTER JOIN SPJ ON S.sNo=SPJ.sNo GROUP BY …

Webselect count() from student group by Sdept 8 select Sno,count(),Sum(Grade) from SC group by Sno 9 select Sno, Sum(Grade) from SC group by Sno having sum(Grade)>=200 10 …

Web11、找出至少有30个学生选修的课程名。. Select cnamefrom c where cno in ( Selectcno from sc group by cno having count (*)>=30 ) 注意本题也可以用连接做. 12、找出选修了不少于3门课程的学生姓名。. Select snamefrom s where sno in ( Selectsno from sc group by sno having count (*)>=3 ) 注意本题也可以 ... WebJun 29, 2024 · SELECT COUNT (*) from student; SELECT COUNT (DISTINCT Sno) from SC; SELECT AVG (Grade) from SC WHERE Cno = '1'; SELECT max (Grade) from SC WHERE Cno = '1'; SELECT SUM (Ccredit) from SC,Course where Sno = '201215122' AND SC.Cno = Course.Cno; GROUP BY clause

Web11.将学生的学号及平均成绩定义为一个视图（s_g），学号用sno表示，平均成绩用gavg表示。 -这不是数据库关系的连接嘛x表的cpno和y表的cno连接那么y表的cpno自然就是x表cno的cpno的cpno即先修课的先修课11.将学生的学号及平均成绩定义为一个视图（s_g），学号用sno …

WebDec 30, 2024 · Using the suitable JOIN is crucial when you want to include zeros in the COUNT () aggregate. If you know how the LEFT JOIN works, it’s easy for you to … qstring simplifyWebMar 19, 2024 · select sno, amount, total = sum (amount) over (partition by sno) from YourTable This will give you exactly what you are looking for, without slowing down your application. EDIT, after OP's comment When altering the query is not an option, the easies way to do it in .NET is to use DataTable.Compute method. qstring right leftWebJul 21, 2010 · 1- Create 2 new integer fields on the Group (‘sys_user_group’) table — one called ‘Group members’ and one called ‘Active group members’. These fields will store the … qstring rightWebwhere s.sdept = 'CS' and (select count(sc41071030.cno) from sc41071030 join c41071030. on sc41071030.cno = c41071030.cno group by sc41071030.sno) > 1 qstring right函数WebJun 4, 2024 · 我们按学号分组查询， select SNo from sc group by SNo 结果：从上面我们可以看到，group by 子句可以将查询结果按某一列或多列的值进行分组。容易出错的点： … qstring split 多个空格WebJun 10, 2024 · SELECT COUNT (SNO),CNO FROM SC GROUP BY CNO; 23. Find out the number and name of all the students who took only one course. SELECT ST.SNO, … qstring size lengthWebcreate viewc_avg(cno,avg_grade) as selectcno,avg(grade) from sc group by cno 再查询 Select distinctsno from sc where sno notin ( Select sno from sc,c_avg where … qstring startswith