Machine Learning With Go

Querying the database

Now that we know how to connect to the database, let's see how we can get data out of the database. We won't cover the specifics of SQL queries and statements in this book. If you are not familiar with SQL, I would highly recommend that you learn how to query, insert, and so on, but for our purposes here, you should know that there are basically two types of operations we want to perform as related to SQL databases:

• A Query operation selects, groups, or aggregates data in the database and returns rows of data to us
• An Exec operation updates, inserts, or otherwise modifies the state of the database without an expectation that portions of the data stored in the database should be returned

As you might expect, to get ...