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
-999.9+union+all+select+%27R3DM0V3_hvj_injection',null%2CNULL%2CNULL
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...
So, as it's being used a lot, I would submit my answer. In my opinion, the aim of these requests is to check the presence or absence of a sql injection. This is the part of the query that is trying to inject: 999999.9 UNION ALL SELECT "91351456272.9","91351456272.9"...
which covers (int *)0 as null pointer since cast is an explicit conversion (C11, 6.3) which is listed under conversion methods.
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...
1' UNION SELECT @--+ #The used SELECT statements have a different number of columns 1' UNION SELECT
999999.9 union all select 0x31303235343830303536-- на YouTube: Поиск реализован с помощью YandexXML и Google Custom Search API.
...Null,null,null,null,null,null,null,null,null,null,null,null,null,concat
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.