Query returns null instead of 0
129545
How to generate data in MySQL?
39863
MySQL: selecting rows where a column is null
139486
NULL value self comparison in a table
151469
What is the difference between null and System.DBNull.Value?
148619
Is there a reason not to use  (null safe equals operator) in mysql instead of =?
60338
Null vs. False vs. 0 in PHP
64884
Why `null >= 0 && null <= 0` but not `null == 0`?
114718
Is there a DBMS that allows the "= NULL" syntax?
141171
Full Outer Join shows NULL when Group By is used
94016
Why my soql query is returning 'RecordTypeId' instead of the fields mentioned in the query?
46959
Passing an array to a query using a WHERE clause
24249
When is the Killing form null?
45869
Why null cast a parameter?
77400
PHP/MySQL/PDO binding null parameter doesn't work
5975
How to avoid returning a Null if there is no "else" condition in an If construct
34563
Why does PHP consider 0 to be equal to a string?
65694
What is the difference between NULL, '\0' and 0?