What are the differences between Null, Zero and Blank in SQL?

Question

Can someone please explain the differences between Null, Zero and Blank in SQL to me?

Answer 1

Could you be more accurate about blank?

For what I understand of your question: "Blank" is the lack of value. This is a human concept. In SQL, you need to fill the field with a value anyway. So that there is a value which means "no value has been set for this field". It is NULL. If Blank is "", then it is a string, an empty one. Zero: well, Zero is 0 ... It is a number.

To sum up:

NULL --> no value set

Blank ("") --> empty string

Zero --> Number equal to 0

Please, try to be more accurate next time you post an answer on Stack!

If I were you, I would check some resources about it, for example: https://www.tutorialspoint.com/sql/sql-null-values.htm