Good. We'll start by talking about boolean columns.
The boolean data type stores logical values, i.e., true or false. This data type usually records the answer to a yes/no question like: "Does the user have pets?"
boolean columns are convenient because they require very little space. However, some databases don't have a separate boolean data type; they simulate it using other types.
Once Peter released the beta version of his dating website, he noticed there were fake accounts. So Peter wants to introduce a new feature – user verification. For now, let's create a simple table called verification with two columns: user_id (integer) and is_verified (boolean).
