[求数据库SQl笔试答案]建立学生表Studentuse mastercreate table student (Sno int,Sname varchar(10),Ssex varchar(2)Sage int,Sdept varchar(10)) 为Student表建立索引create unique clustered...+阅读
SQL题目初学者需要高手给答案
update card set+cardno where and len(cardno)=12select top 5 cusinfo.cusid,cusinfo.name,sum(jyinfo.money),sum(jyinfo.sxf) from jyinfo left join cusinfo on jyinfo.cusid=cusinfo.cusidwhere jyinfo.way=1 and datediff(month,jyinfo.date,'1998-3-1')=0group by cusinfo.cusid,cusinfo.nameorder by sum(jyinfo.money) desc大概应该是这样子...
SQL数据库题目解答
2.select sno,sname,major from student where major in(select cno from course where) 3.没有见到有选课表 4.select cname from course where cno not in(select distinct major from student)
5.USE master GO CREATE DATABASE Stu --创建数据库 GO USE Stu GO CREATE TABLE student (sno char(10) PRIMARY KEY, sname nvarchar(20) NOT NULL, sex char(2) default '男', major nvarchar(20), birthday date) CREATE TABLE course (cno char(10) PRIMARY KEY, cname nvarchar(20) NOT NULL, credit nvarchar(20)) CREATE TABLE sc (sno char(10), cno char(10), grade decimal(3,1), CONSTRAINT [PK_sc] PRIMARY KEY CLUSTERED ([sno] ASC,[cno] ASC), CONSTRAINT [FK_sc_student] FOREIGN KEY([sno])REFERENCES [dbo].[student] ([sno]), CONSTRAINT [FK_sc_course] FOREIGN KEY([cno])REFERENCES [dbo].[course] ([cno]) )
SQL疑难笔试题
1.select max(infoID)+1-min(infoID)-count(infoID) from Info
2.
declare id int,
select id=min(infoID) from Info
declare ckid int
declare ID_cursor cursor
for
select infoID from Info
open ID_cursor
fetch from ID_cursor into ckid
while fetch_status=0
begin
if(ckid=id)
begin
id=id+1
fetch from ID_cursor into ckid
end
else
begin
print '丢失记录为'+convert(nvarchar(20),id)
return
end
end
select id=min(infoID) from Info
print ''丢失记录为'+convert(nvarchar(20),id)'
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