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...
select a,b,null,null from table1 union select null,null,c,d from table2 union select null,null,null,null,e,f from table3.
' UNION SELECT NULL-- ' UNION SELECT NULL,NULL-- ' UNION SELECT NULL,NULL,NULL-- etc. If the number of nulls does not match the number
In the same, the null mutants exhibited a decreased amount of duplication .
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...
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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Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.
at the end this is quite the same the data I'm going to merge, what's wrong with my views? the information schema knows very well the data type of the filled columns. and... sorry... another one question, the article in the msdn shows that the int is not at the top of the priority (see the link in my...
Example union attack. The UNION keyword lets you execute one or more additional SELECT