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 …
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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...NULL,NULL,NULL,NULL,NULL ,NULL,NULL,NULL,NULL,NULL,NULL,version(),NULL,NULL
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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
...par=1 or (select count(*)from(select 1 union select 2 union select 3)x group by concat(mid
The tutorial comprises of brief explanation on NULL value, NOT NULL value, NULL keywords and comparison of NULL values.
SELECT * FROM ( SELECT 1 AS a FROM DUAL UNION ALL SELECT 2 AS a FROM DUAL UNION ALL SELECT 3 AS a FROM DUAL ) t. Now that you’re seeing that VALUES() and derived tables are really the same thing, conceptually, let’s review the INSERT statement, which comes in two flavors