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 ...

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 ...

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...

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 ...

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 ...