Discover how data is used to answer questions. Learn about databases, records and fields, and how sorting, filtering and searching help organisations make decisions.
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You can find more about this topic by visiting BBC Bitesize - Data and databases
The shop can track what customers buy and use that to send out special offers related to the items they buy the most
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This will be a relational database as the store will record all of the items that each customer with a loyalty card buys
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They are usually read using the barcode reader that is used on the items bought
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It uses an automatic input system
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Building a customer profile could be a privacy violation
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Price and stock levels are stored on a database linked to the product ID and are not part of the bar code
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Another example for you of an automatic input
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Stock levels are also automatically adjusted
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The printed bill is really for the customer's benefit
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In other words, a payment using a debit or credit card
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