A question asked about data contained in two or more tables in a relational database. The relational query must specify the tables required and what the condition is that links them; for example ...

Because of this, mistakes are less likely to happen and if there were a mistake in a customer's record, for example, correcting it will correct the mistake database-wide. Duplication is avoided ...

Relational databases can be implemented to help reduce (but not remove) data redundancy, which improves data consistency and integrity. Relational database design attempts to achieve this by ...

The data are stored in a traditional relational database or in an object database ... and one instance of a class is an "object." For example, in a payroll system, a class could be Manager ...

Java Database Connectivity (JDBC) is an application program interface (API) packaged with the Java SE edition that makes it possible to standardize and simplify the process of connecting Java ...