Whenever there is a comparison of GDPs amongst the countries, Purchasing Power Parity (PPP) concept is very vital to understand. Gross domestic Product (GDP) represents an accounting of the total value of all final goods and services produced in a geographic region over a specific period of time, usually one year.
From Wikipedia, the free encyclopedia. A globally unique identifier (GUID, /ËÉ¡aÉªd/ or /ËÉ¡uËÉªd/) is a unique reference number used as an identifier in computer software. The term GUID typically refers to various implementations of the universally unique identifier (UUID) standard.
You can use an identifier column to create an automatically incrementing identification number in a table. You can create only one identifier column and one GUID column for each table. IDENTITY Property. You can implement identifier columns by using the IDENTITY property.he default value for both is 1. The identifier column must not allow for null values and must not contain a DEFAULT definition or object. The column can be referenced in a select list by using the $IDENTITY keyword after the IDENTITY property has been set.