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...
union all select null null null null null null null null null null select concat 0x7e 0x27 angry beird SPONGE BOB HIDDEN OBJECT ben 10 spider monkey games snail of t barbie gril dressup girl with funky costumes Mallika Kiss t l charger super mario rampage train flash games drees up santa cluas...
Payload: id=11 UNION ALL SELECT NULL,NULL,NULL,CONCAT(0x7162686471,0x4567455251765277467a,0x7172716271),NULL#.
Have you some idea regarding this warning that appears in the last stable release on my Mac? Emulator: Warning: Failed to get QCocoaScreen for NSObject(0x0) ((null):0, (null)).
null null null. Apparently, this user prefers to keep an air of mystery about them.
...SELECT NULL,NULL,NULL,NULL,NULL,NULL,CONCAT(0x71717a6271
In SQL, a comparison between a null value and any other value (including another null) using a comparison operator (eg =, !=, <, etc) will result in a null, which is considered as false for the purposes of a where clause (strictly speaking, it's "not true", rather than "false", but the effect is the same).
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Ошибка дизайна Именно так и никак иначе: null в C# — однозначно ошибочное решение, бездумно скопированное из более ранних языков. Самое страшное: в качестве значения любого ссылочного типа...
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