Why the count function returns 1 for false and 0 for NULL
43338
count of false gives 1 and if of an empty array gives false. why?
5975
How to avoid returning a Null if there is no "else" condition in an If construct
120934
What is the difference between null=True and blank=True in Django?
152523
NSCountedSet - get count of items in set
90598
PHP considers null is equal to zero
47887
NULL values in where clause
156262
One step check for null value & emptiness of a string
70585
Why does Assuming[x > 0, TrueQ[x > 0]] return False?
110887
Trying to get count of childs rows
64884
Why `null >= 0 && null <= 0` but not `null == 0`?
69607
Do you use NULL or 0 (zero) for pointers in C++?
37436
In PHP, 0 (int, zero) is equal to "first" or "last" (strings)?
6490
Help with null hypothesis
79162
Javascript null or empty string does not work
110561
Count property vs Count() method?
114378
How to check if the string is empty?
83063
Count(*) vs Count(1) - SQL Server