select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database. If TYPE OF is used with a (VAR)CHAR type, its character.
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...
sql - Union to handle NULL values - Stack Overflow ... count(*),concat((select ( select concat(0x7e,0x27,Hex(cast(user() as char)),0x27,0x7e)) from information_schema.tables limit 0,1) ... whatsapp for windows phone pc
...cast(0x393133353134353632312e39 as char) and "0" ="0 · nexium 40 mg price cvs1111111111111 union select char(45
Используйте NULL в UNION-инъекциях вместо попыток угадать строку, дату, число и прочее. Но будьте аккуратны при слепой инъекции, т.к. вы можете спутать ошибку БД и самого приложения. Некоторые языки, например ASP.NET, выдают ошибку при использовании значения NULL (т.к...
A list of useful payloads and bypass for Web Application Security and Pentest/CTF - swisskyrepo/PayloadsAllTheThings.
SELECT col1 AS col FROM yourtable UNION SELECT col2 AS col FROM yourtable UNION -- ... UNION SELECT coln AS col FROM yourtable ) T1 WHERE col IS NOT NULL. And I agre with Martin that if you need to do this then you should probably change your database design.
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.
SELECT username FROM Users WHERE id = '-1' UNION SELECT MID(GROUP_CONCAT(0x3c62723e
Note: A NULL value is different from a zero value or a field that contains spaces. A field with a NULL value is one that has been