Definitions for "Null string"
Keywords:  string, zero, empty, awk, character
(1) A string whose first byte is a null byte. See empty string. X/Open. (2) A character array whose first element is a null character. .
A character or bit string with a length of zero.
a string of length zero
Keywords:  hour, database, search, result
The result of a 4-hour database search.