For web developers, the database is at the core of web development. You can save almost anything into a database and query or update data inside it, like user information, products or news articles.
Go doesn't provide any database drivers, but it does have a driver interface defined in the database/sql package. People can develop database drivers based on that interface. In section 5.1, we are going to talk about database driver interface design in Go; in sections 5.2 to 5.4, I will introduce some SQL database drivers to you; in section 5.5, i'll present the ORM that i've developed which is based on the database/sql interface standard. It's compatible with most drivers that have implemented the database/sql interface, and it makes it easy to access databases idiomatically in Go.
NoSQL has been a hot topic in recent years. More websites are deciding to use NoSQL databases as their main database instead of just for the purpose of caching. I will introduce you to two NoSQL databases, which are MongoDB and Redis, in section 5.6.
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