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mysql - Confusing SQL error in SELECT NULL, *, NULL, NULL

stackoverflow.com

UNION ALL SELECT NULL, *, NULL, NULL FROM email. I understand what this does and why; the hacker needs to create a

sql - CONCAT'ing NULL fields - Stack Overflow

stackoverflow.com

Now, if I do: SELECT CONCAT(FirstName, LastName, Email) as Vitals FROM MEMBERS.

sql injection "union select null" - CodeProject

www.codeproject.com

Union select null, null, null, null, null, null, null from information_schema.tables. for a small database containing three tables. this instruction is used in sql injection I tried it and it worked but I didn't really know how it works can somebody help me...

advanced search - MySQL Select Column if Not Null only

stackoverflow.com

SELECT IFNULL(firstname,'') AS firstname, IFNULL(lastname,'') AS lastname, IFNULL(age,'') AS age, IFNULL(gender,'') AS gender FROM persons WHERE id = 1; Method2: You can get all values in single column using concatenate function.

Шпаргалка по SQL инъекциям | DefconRU

defcon.ru

Синтаксис: 0xHEX_ЧИСЛО (SM): SELECT CHAR(0x66) (S) SELECT 0x5045 (это не число, а строка) (M) SELECT 0x50

(//select 1 /'/**/union/**/all/**/select/**/null, null, null, null, null, null...

1494.kz

mysql> SELECT NULL, 1+NULL, CONCAT('Invisible',NULL); To search for column values that are NULL, you cannot use an expr = NULL test. The following statement returns no rows, because expr = NULL is never true for any expression: Press CTRL+C to copy. mysql> SELECT * FROM my_table...

The SQL Injection Knowledge Base

websec.ca

-1 union select 1 into @,@,@ The used SELECT statements have a different number of columns.

SQL Инъекции | Page 798 | ANTICHAT - Security online community

forum.antichat.ru

from+information_schema.tables+limit+0,1),floor(rand(0)*2)

Внедрение SQL-кода

ru.wikipedia.org

Внедрение SQL-кода (англ. SQL injection) — один из распространённых способов взлома сайтов и программ, работающих с базами данных, основанный на внедрении в запрос произвольного SQL-кода.

COUNT(*) / Хабр

habr.com

SELECT FirstName, COUNT(*) FROM Person.Person GROUP BY FirstName. Посмотрел на план запроса и увидел там явно неадекватное значение Estimated number of rows: Заглянул в статистику по кластерному индексу

Похожие запросы:

'')/**/union/**/all/**/select/**/null,null,null,null,null,null,null,null,null,null--/**/ecza grand theft auto san andreas full version game download link
')/**/and/**/(select/**/9349/**/from(select/**/count(*),concat(0x7176707671,(select/**/(elt(9349
')/**/and/**/(select/**/9349/**/from(select/**/count(*),concat(0x7176707671,(select/**/(elt(9349=9349,1))),0x716a786271,floor(rand(0)*2))x"121121121212.1
')/**/and/**/(select/**/9349/**/from(select/**/count(*),concat(0x7176707671,(select/**/(elt(9349=9349,1))),0x716a786271,floor(rand(0)*2))x%2
')/**/and/**/(select/**/9349/**/from(select/**/count(*),concat(0x7176707671,(select/**/(elt(9349=9349,1))),0x716a786271,floor(rand(0)*2))x%2 and 1=1
')/**/and/**/(select/**/9349/**/from(select/**/count(*),concat(0x7176707671,(select/**/(elt(9349=9349,1))),0x716a786271,floor(rand(0)*2))x%2 and 1>1
')/**/and/**/(select/**/9349/**/from(select/**/count(*),concat(0x7176707671,(select/**/(elt(9349=9349,1))),0x716a786271,floor(rand(0)*2))x%2 or (1,2)=(select*from(select name_const(char(111,108,111,108,111,115,104,101,114),1),name_const(char(111,108,111,1
')/**/and/**/(select/**/9349/**/from(select/**/count(*),concat(0x7176707671,(select/**/(elt(9349=9349,1))),0x716a786271,floor(rand(0)*2))x%2" and "x"="x
')/**/and/**/(select/**/9349/**/from(select/**/count(*),concat(0x7176707671,(select/**/(elt(9349=9349,1))),0x716a786271,floor(rand(0)*2))x%2" and "x"="y
')/**/and/**/(select/**/9349/**/from(select/**/count(*),concat(0x7176707671,(select/**/(elt(9349=9349,1))),0x716a786271,floor(rand(0)*2))x%2" or (1,2)=(select*from(select name_const(char(111,108,111,108,111,115,104,101,114),1),name_const(char(111,108,111,

(/select 1 /'/**/union/**/all/**/select/**/null,null,null,null--/**/jnit/from(/select count(),/concat((/select(/select /unhex(/hex(/concat(0x217e21,0x4142433134355a5136324457514146504f4959434644,0x217e21)))) /from information_schema./tables /li на YouTube:

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