Mikhail Gorbachev's policies of glasnost and perestroika had profound and unintended effects on the Soviet Union. In fact, many historians suggest these reforms led directly to the fall of communism and the breakup of the Soviet Union.
In SQL Server, you create a surrogate key by assigning an identity property to a column that has a number data type. A natural key is a naturally occurring descriptor of the data and one of a table's attributes that has no duplicate values. When you use a natural key as a table's primary key, each of the table's rows is uniquely identified.
Whether or not you agree with using SQL to query Active Directory, it is an option, and this article shows how it can be done. There are three ways to query Active Directory (AD) from SQL Server: Using CLR Stored Procedures, using the OpenRowset command, and using the OpenQuery command. This article focuses on the OpenRowset and OpenQuery commands. OpenRowset.