1查詢年齡在19至21歲之間的女生的學號,姓名,年齡,按年齡從大到小排列。
2查詢姓名中第2個字爲“明”字的學生學號、性別。
use student
GO
select sno, sname, sage,ssex from student
where ssex='女' and sage between 19 and 21
use student
GO
select sno,sname,ssex from student
where sname like'_明%'
3查詢 1001課程沒有成績的學生學號、課程號
select sno, cno
from sc
where grade is null and cno='1001'
4查詢專業爲JSJ SX 計算機並且年齡大於25歲的學號和姓名
select Sno,Sname from student
where Sdept in('JSJ' ,'SX' ,'計算機')and Sage>25
select Sno,Sname from student
where (Sdept='JSJ' OR Sdept='SX' OR Sdept='計算機')and Sage>25
5查詢學號課程號，成績以十倍顯示並以A命名
select sno,cno,grade*10 as A from SC
6查詢學生表中的系名
select distinct Sdept from student