key value pair

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Key-value pair is a phrase used to refer to any data set that has two parts, an identifier known as a key and a value being the data captured.

Use Cases and Examples

key-value pairs make it easy to organize data into groups. There are many data stores and data structures that store information as key-value pairs. For example the JSON data structure


In the above example one of the objects has name as the key and the value being Ama.

Some databases that implement key-value pair structures include redis and memcached. Because of the simple nature of key-value data stores they are mostly used to store simple data sets like cached data and queue values.

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