--查询每名学生的学号、选修课程数目、总成绩、并将查询结果存放到生成的’学生选课统计表‘中use teachinggoif exists (select * from sys.objects where name='学生选课统计表')drop table 学生选课统计表select studentno,COUNT(*) as '选修课程数目',sum(final) as '总成绩' i
SQL经典50查询语句案例_12 12.查询至少学过学号为“1001”同学所有课程的其他同学学号和姓名 SELECT res.SId, student.StuName FROM(SELECT b.SId, COUNT(*) as number FROM(SELECT SId FROM(SELECT CId FROM sc WHERE SId = '1001')a,sc aaWHERE a
SQL经典50查询语句案例_1 前言:最近复习sql做这个的时候,发现sql查询其实还有很多内嵌方法,所以把做过的笔记记一下子,方便自己方便大家。 1、查询“001”课程比“002”课程成绩高的所有学生的学号: SELECT a.SId FROM Sc a, Sc bWHERE a.SId = b.SId AND a.CId = '001' AND b.CId = '002' AND
SQL经典50查询语句案例_10: 10、查询没有学全所有课的同学的学号、姓名: SELECT stu.SId, stu.StuName FROM student stu,(SELECT COUNT(CId) as number FROM course)t1,(SELECT SId,COUNT(CId) as number FROM sc GROUP BY SId)t2WHEREt1
SQL经典50查询语句案例_6: 6、查询学过“001”并且也学过编号“002”课程的同学的学号、姓名: SELECTst.SId,st.StuNameFROM(SELECT t1.SId AS SIdFROM (SELECT s1.SId FROM sc s1 WHERE s1.CId = '001')t1,(SELECT s2.SId FROM sc s2 WHERE s2.CId
源代码: public class Main { public static void main(String[] args) { System.out.println("学号是:"+"0233217821"); System.out.println("姓名是:"+"赵港"); System.out.println("兴趣爱
源代码: public class Main { public static void main(String[] args) { System.out.println("学号是:"+"0233217821"); System.out.println("姓名是:"+"赵港"); System.out.println("兴趣爱