sql queries

Une base de données Oracle est un ensemble de données traitées comme une unité.

1) The purpose of a database is to store and retrieve related information.

2) A database server is the key to solving the problems of information management.

3) In general, a server reliably manages a large amount of data in a multi user environment

so that many users can concurrently access the same data.

4) All this is accomplished while delivering high performance.

5) A database server also prevents unauthorized access and provides efficient solutions for

failure recovery.