Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

Switching a partition involves no copying, moving or deleting of data. Internally it is a mere matter of resetting a pointer from one table partition to another identically structured table partition.

When the data requirements of an organization change, the databases used to store the data must also change. Unfortunately, today's database systems do not make managing database change particularly ...