<P> In a relational database , all data are stored and accessed via relations . Relations that store data are called `` base relations '' , and in implementations are called `` tables '' . Other relations do not store data , but are computed by applying relational operations to other relations . These relations are sometimes called `` derived relations '' . In implementations these are called `` views '' or `` queries '' . Derived relations are convenient in that they act as a single relation , even though they may grab information from several relations . Also , derived relations can be used as an abstraction layer . </P>
<P> In a relational database , all data are stored and accessed via relations . Relations that store data are called `` base relations '' , and in implementations are called `` tables '' . Other relations do not store data , but are computed by applying relational operations to other relations . These relations are sometimes called `` derived relations '' . In implementations these are called `` views '' or `` queries '' . Derived relations are convenient in that they act as a single relation , even though they may grab information from several relations . Also , derived relations can be used as an abstraction layer . </P>
where is data stored in a relational database
where is data stored in a relational database
relations
relations