ISYS2056 Lecture Notes - Lecture 10: Microsoft Access, Data Redundancy, Meridian Regional Airport

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11 Oct 2018
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We could simply add the venue details into our customers table. But, if a customer operates more than one venue, we would repeat their customer information on each record. We will have to change their address details on each of the records we hold for them for each venue. This is time consuming and increases the likelihood of mistakes as we are repeating the same information. If we set up two tables; one for the customer details and one for the venue details, we remove the redundant data by only holding the customer details once: relational databases. We need to relate the tables to each other. Then, for example, we can look up a venue in the venue table and find the phone number of the customer who owns it. This is where the term, relational database, comes into our design process.

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