In SQL Server, what does “SET ANSI_NULLS ON” mean?

Question

The definition says:

When SET ANSI_NULLS is ON, a SELECT statement that uses WHERE column_name = NULL returns zero rows even if there are null values

Answer 1

SET ANSI_NULLS ON

IT Returns all values including null values in the table

SET ANSI_NULLS off

it Ends when columns contains null values