How do databases query so fast?

How do databases search so fast?

Most people ask why is database so faster when compared to flat file entries of data. There are many reasons behind that, one of them is indexing. Of course the speed of the underlying disk subsystem's also plays a major role in increasing database speed.

How is SQL query so fast?

The reason SQL is so fast is that for a database product to be successful it must return sets of data quickly when queried. In most database organizations many of the companies brightest people work constantly on the query engine so it creates 'optimal' query plans that work quickly.

What makes database fast and efficient?

Indexing creates a data structure that helps keep all your data organized and makes it easier to locate information. Because it's easier to find data, indexing increases the efficiency of data retrieval and speeds up the entire process, saving both you and the system time and effort.

Which database is very fast?

Cassandra is arguably the fastest database out there when it comes to handling heavy write loads. Linear scalability. That is, you can keep adding as many nodes to a cluster as you want, and there will be a zero increase in complexity or brittleness of the cluster. Unmatched partition tolerance.