SQLi Dumper 7.0 Dumping NULL Cells ?

[CrackZoneGuru]

Anyone pls help here what the meaning of NULL when dumping ? Is it something wrong wid the database itself. 

 

 

Oh BTW im using 50 threads, timeout set to 2500, delay ms to 250 & retry limit 1000. This is my settings which i always been using and work like a charm. Here what the meaning of NULL ?  I'd appreciate if any professional sqli user would enlightened me here. Thank You

[meowtit]

null. Null means having no value; in other words null is zero, like if you put so little sugar in your coffee that it's practically null. Null also means invalid, or having no binding force. From the Latin nullus, meaning "not any,"