What is NULL-CHECK function in SQL?

Programming Language
#1

SQL Null check is performed using either IS NULL or IS NOT NULL to check whether a value in a field is NULL or not. When a field value is NULL it means that the database assigned nothing in that field for that row. The NULL is not zero or blank. It represents an unknown or inapplicable value.

Syntax:

SELECT
Column

(s)
FROM

table_name
WHERE
column
IS
NULL
;

Above query will give us result set where specified column value is null. We will understand the above-mentioned syntax in more detail through some examples.