Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Apache ObJectRelationalBridge (OJB) is an Object/Relational mapping tool that allows transparent persistence for Java Objects against relational databases. A relational database matches data by using common characteristics found within the data set. The resulting groups of data are ...Täydellinen kuvaus
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Apache ObJectRelationalBridge (OJB) is an Object/Relational mapping tool that allows transparent persistence for Java Objects against relational databases. A relational database matches data by using common characteristics found within the data set. The resulting groups of data are organized and are much easier for many people to understand. For example, a data set containing all the real-estate transactions in a town can be grouped by the year the transaction occurred; or it can be grouped by the sale price of the transaction; or it can be grouped by the buyer's last name; and so on. Such a grouping uses the relational model (a technical term for this is schema). Hence, such a database is called a "relational database."