Concurrency control

Concurrency control is like taking turns when playing a game with your friends.

Imagine you and your two friends want to play with the same toy. If you all played with it at the same time, it would get messy, and it would not be fun. So, you need to decide who gets to play with the toy first and for how long.

This is what concurrency control does when different users want to access the same data at the same time. It makes sure that each person gets their turn, that nobody is playing with the toy when it is someone else's turn, and that everyone has a fair share of playing time.

Concurrency control helps prevent problems such as data inconsistency, lost updates, and other issues that can arise when multiple users try to access the same data simultaneously. It enforces rules that govern how multiple transactions can interact with each other, so they do not interfere with each other.

In summary, just like taking turns in a game with your friends, concurrency control ensures that multiple users can access data simultaneously without causing conflicts or inconsistencies.