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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I have following data in my table "devices" … I executed below query … It returns result given below … How to come out of this so that it should ignore NULL AND result should be …
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Union select null, null, null, null, null, null, null from information_schema.tables. for a
...SELECT NULL,NULL,NULL,version(),NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
SELECT * FROM tableName WHERE $phpVar AND price!='sold' ORDER BY id DESC. The $phpVar is populated based on if a $_GET entry matches a
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/index.php?id=null union all select 1,2,3,4,user(),6,database(),8,version(),10,11,12,1 3,14,15–. As you can see we selected values from the showing columns, what if we want to clean this up a bit, and put all of those selected values in one column? This is where concat() comes in
The tutorial comprises of brief explanation on NULL value, NOT NULL value, NULL keywords and comparison of NULL values.