With Char(), NULL values are skipped. The function is used within Microsoft SQL Server, Sybase, and MySQL, while CHR() is used by RDBMSs. SQL's Char() function comes in handy when (for example) addslashes() for PHP is used as a precautionary measure within the SQL query.
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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...
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Examples of sites using "union select" in HTML/JavaScript/CSS source code.
...Union/**/all/**/select/**/null,null,null,null,null,null,null,null
11223344) UNION SELECT NULL,NULL,NULL,NULL WHERE 1=2 –- Если нет ошибки, значит синтаксис верный, т.е. используется MS SQL Server.
Можно прописать NULL – тогда вместо поля ничего не будет выведено. Обратите внимание, что содержимое некоторых полей UNION SELECT 2,3,4,5 выводится на экран. Вместо цифр можно задать функции.
Онлайн-Статус. onlineState. online = в сети offline = не в сети In-Game = в игре. Статус-сообщение. stateMessage. Online = В сети Last Online = Последний вход In-Game [...] =
SELECT model FROM ( SELECT model, price FROM pc UNION SELECT model, price