sql - Relational DB in-memory? -

I have a simple question on radis if its key to display is that it is in memory, then it is a regular SQL Can not be done on DB?

Any DBMS can be run in "memory" consider using one However, most of the DBMS Not designed to run fully in memory (with SQL) and insert lots of trying to reduce disk IO and paging: a DBMS lot Hard "relevant data" hot (in memory and in the cache) - Io is slow slow down.

The reason for this is that database data is often [more historically done] large enough main memory is more volatile than it is :-) [ACID DBMS works with a non-volatile store- and other techniques as well as a lot of work - and to ensure that other techniques are never corrupted, even if an unexpected closure occurs. ]

Some databases, such as SQLite disks and memory stores, use the same format even though they explicitly support in-store storage. Other [in-memory] back-end and memory usage tuning varies by the support provider.

Happy coding.