Difference between updation with NULL and ''?
2097
Why does Oracle 9i treat an empty string as NULL?
120428
Entering null characters in a string
76573
Is there a difference between "raise exception()" and "raise exception" without parenthesis?
102608
WITH ROLLUP WHERE x IS NULL
114349
What is a null-terminated string?
111925
What's the difference between !, %, and @ in replacement tokens?
27219
Is there any difference between type? and Nullable?
22361
String concatenation with Null
43769
How do I Parameterize a null string with DBNull.Value clearly and quickly
140738
Does setting Java objects to null do anything anymore?
153624
What's the difference between is_null($var) and ($var === null)?
123143
What do newcommand, renewcommand, and providecommand do, and how do they differ?
50081
When should I use nil and NULL in Objective-C?
79477
Why is "null" present in C# and Java?
54143
Why is the default value of the string type null instead of an empty string?
83756
What's the difference betwen " and ' - and when to use it?
8283
Why does null reference print as "null"