A robust database is the key to building high-performing and scalable web applications. Whether you are building a simple ...

Routine queries to a relational database often require data from more than one file. For example, to obtain the names of customers who purchased a particular product, data must be extracted from ...

A relational DBMS organizes and accesses data according to relationships ... Certain restrictions might apply when a view derives its data from multiple tables or other views. For example, updates, ...

Any data that does not fall into the traditional field structure (alpha, numeric, dates) of a relational DBMS. Examples of complex data types are bills of materials, word processing documents ...

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 ...

In a relational database, it is necessary to define the ... There are two ways to do this: In these examples the words 'is used on' appear on the line that shows the relationship between the ...

This module covers DBMS essentials such as concurrency management, backup & recovery, and transaction logging. We have learned to design a Relational Database around the typical transactions or ...

In this example, you create a simple table to test for yourself how the options work. To use name literals, you must specify the SAS system option VALIDVARNAME=ANY. Notice that you print the new DBMS ...