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資料庫系統原理與設計——select操作

書籍:資料庫系統原理與設計(第3版)——萬常選 廖國瓊等編著

資料庫版本:SQL Server 2005

/*

select courseNO as 課程號,lower(coursename) 課程名,courseHour/16 as 周課時

from course

*/


/*  --”%任意字元","_"萬用字元的使用

select *

from class

where className  like '%會計%'



select studentNo,studentName

from Student

where studentName like '王__'


select studentNo,studentName

from Student

where studentName not like '%福%'


select studentNo,studentName,nation

from Student

where nation  not like '蒙古族'


select studentNo,studentName,nation

from Student

where nation like '蒙古族' 

*/


--萬用字元的使用

/*

select className

from class

where className like '%16\_%' ESCAPE '\'

union

select className

from class

where className like '%16\_%'  --不對

union

select className

from class

where className like '%16_%' ESCAPE '\'  --不對

*/


--轉義字元的使用,以下兩種方法相似

/*

select className

from class

where className like '%16#_%' escape '#'


select className

from class

where className like '%16\_%' ESCAPE '\'

*/


/* --學會邏輯運算子or  and 

select studentNo,courseNO,score

from score

where courseNo='001' or courseNo='005' or courseNo='003'


select studentNo,courseNO,score

from score

where courseNo='001' and  courseNo='003'


select studentNo,courseNO,score

from score

where courseNo in('001','005','003')


*/


/*

select studentNO as 學號,studentName as 姓名 ,year(birthday) as 出生年份

from Student

where year(birthday)=1998 and nation='漢族'

*/


/*  --籍貫不在南昌和上海的,兩種實施方法,二選一

select studentNO as 學號,studentName as 姓名 ,native

from Student

where native not in ('南昌','上海')


select studentNO as 學號,studentName as 姓名 ,native

from Student

where  native!='南昌' and native!='上海'

*/


/*  80——90區間的分數

select studentNo,courseNO,score

from score

where  score>=80 and  score<=90


select studentNo,courseNO,score

from score

where  score between 80 and 90

*/


/*

select studentNo,courseNO,score

from score

where score<80 or score>90

*/


/*

--按籍貫排序

select studentName,native,classNo

from student

where native!='南昌' and native!='上海'

order by native desc 

*/

該教材相關資料請點選如下連結:

http://blog.51cto.com/sky9896/2323447

http://down.51cto.com/data/2456174