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You have completed Modifying Data with SQL!
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Data isn't static, it changes over time. Databases allow you to modify that data over time.
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Whether the application is an e-commerce,
sports team, or social network site, or
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even a productivity app on your phone,
the data needs to change over time.
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For example, if you run an e-commerce
site, you'd want to search for
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products, update stock counts,
create new orders or
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new products in your database and
remove all discontinued products.
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The site is dynamic because its
state changes all the time.
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In short, there are four main operations
that you'd want to perform on data
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