What's an alternative to data tables for key/value pairs?

1. What data type is used to store key-value pairs?
2. How do you represent a key-value pair?
3. Which data structure supports elements should be in key-value pair?

What data type is used to store key-value pairs?

A key-value database is a type of nonrelational database that uses a simple key-value method to store data. A key-value database stores data as a collection of key-value pairs in which a key serves as a unique identifier. Both keys and values can be anything, ranging from simple objects to complex compound objects.

How do you represent a key-value pair?

A key-value pair consists of two related data elements: A key, which is a constant that defines the data set (e.g., gender, color, price), and a value, which is a variable that belongs to the set (e.g., male/female, green, 100). Fully formed, a key-value pair could look like these: gender = male. color = green.

Which data structure supports elements should be in key-value pair?

A hash table is a data structure that is used to store keys/value pairs. It uses a hash function to compute an index into an array in which an element will be inserted or searched.