Nullif and equal values
128255
Empty Strings: Why or when is '' equal to ' '?
120071
Checking for a null int value from a Java ResultSet
94973
Why type "int" is never equal to 'null'?
47887
NULL values in where clause
156262
One step check for null value & emptiness of a string
157835
SQL Data Reader - handling Null column values
53664
What's the difference between equal?, eql?, ===, and ==?
10184
Altering a column: null to not null
63123
Excel: identifying if all values in a row are not equal
48512
Placing null at the end of the List
64884
Why `null >= 0 && null <= 0` but not `null == 0`?
43769
How do I Parameterize a null string with DBNull.Value clearly and quickly
83354
Nullable types: better way to check for null or zero in c#
104501
How do I enforce null checking?
127005
' ... != null' or 'null != ....' best performance?
148619
Is there a reason not to use  (null safe equals operator) in mysql instead of =?
23886
Matching a case when one element in a pair is Null