Unique key

A unique key is like a special password that only works for you.

Let's say you want to keep your diary safe and secure so nobody else can read it. You decide to make a special key that only fits the lock on your diary. This key is unique because it only works for that one specific lock and nobody else can use it to open your diary.

In computer terms, a unique key is similar. When we save information in a database, we use a unique key to make sure each piece of information is different and specific to one particular item or entry. Just like your diary, nobody else should be able to access or change that information, unless they have the specific unique key assigned to it.

This unique key is assigned by the computer system and is usually a number or a combination of numbers and letters. It helps us find the specific piece of information we need easily and quickly, without having to go through all the other saved data.

In summary, a unique key is a special code or password assigned to a particular item of data to ensure that it can be identified and accessed easily, but securely.