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.
Use the IN clause to append records to a table in another database. To create a new table, use the SELECTâ¦ INTO statement instead to create a make-table query. To find out which records will be appended before you run the append query, first execute and view the results of a select query that uses the same selection criteria. An append query copies records from one or more tables to another.