What is the comparison between nosql and relational databases?

• What is the comparison between nosql and relational databases?

Advantages:

1) Cost: nosql databases are simple and easy to deploy. They are basically open-source software and do not need to be purchased and used at the same cost as Oracle, which is cheaper than relational databases.

2) query speed: nosql databases store data in the cache, relational databases store data on hard disks, and the natural query speed is far lower than that of nosql databases.

3) Data Storage Format: nosql stores data in key, value, document, and image formats. Therefore, it can store basic types, objects, collections, and other formats, databases only support basic types.

4) Scalability: relational databases have restrictions on the Multi-Table query mechanism similar to join, which makes expansion difficult.

Disadvantages:

1) maintenance tools and materials are limited, because nosql is a new technology and cannot be used in the same way as relational databases for more than 10 years.

2) It does not support SQL. If it does not support industrial standards such as SQL, it will produce certain learning and usage costs for users.

3) Transaction Processing by relational databases is not provided