select a,b,null,null from table1 union select null,null,c,d from table2 union select null,null,null,null,e,f
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I need results to be shown in one row instead of few. Query: … I suppose I need to get rid somehow of few things in GROUP BY however I don't really have an idea how to change...
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The null character (also null terminator or null byte) is a control character with the value zero. It is present in many character sets, including ISO/IEC 646 (or ASCII), the C0 control code, the Universal Coded Character Set (or Unicode), and EBCDIC.
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...
Предикат IS NULL позволяет проверить отсутствие (наличие) значения в полях таблицы. Использование в этих случаях обычных предикатов сравнения может привести к неверным результатам, так как сравнение со значением NULL дает...
Number of null-s on change between passed and failed queries is the one attacker looks for.
Note: A NULL value is different from a zero value or a field that contains spaces.