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.
In a Boolean context, the value of null is considered a false value in JavaScript. Note: Null is a true primitive-type within the JavaScript language, of which null (note case) is the single value. As such, when performing checks that enforce type checking, the null value will not equal other false types. Surprisingly, null is considered an object by typeof.