In addition to the the Commonwealth Ensign, there are three other official Australian ensigns: 1  The Australian Red Ensign - Merchant Navy, as for the Australian flag, but with a red field with white stars. 2  The Australian White Ensign - Royal Australian Navy - as for the Australian flag but with a white field and dark blue stars.
Null (or NULL) is a special marker used in Structured Query Language to indicate that a data value does not exist in the database. Introduced by the creator of the relational database model, E. F. Codd, SQL Null serves to fulfil the requirement that all true relational database management systems (RDBMS) support a representation of missing information and inapplicable information.
So ANSI has set some very basic standards for NULL. Any comparison or calculation performed with NULL is NULL. for example NULL + 1 = NULL. If (NULL = âNULLâ) => FALSE. NULL is neither a string nor any number. So, When I do SET ANSI_NULLS ON; I am simply telling SQL SERVER to follow the standard of ANSI. Let us see with below example. When ANSI_NULLS is set to ON. â=â operator is not able to identify . This is the standard of ANSI that any comparison with NULL is always . So you will never ever get a result for this. To find NULL in a column we use Keyword âIS NULLâ.