Most of the activities in this chapter will take place in the pgAdmin environment. We will learn how to utilize the convenient functionality it offers to create a nice, well-structured database without thinking of long commands. Of course, GUI operations cannot be automated, and using the CLI is generally faster (if we know exactly how to use it); therefore, we will also see those commands, as pgAdmin actually builds them from the options we include, and lets us see the result. First of all, let's see what pgAdmin has to show us if we open our database:
Don't worry if you use pgAdmin 4--it has more items to show. However, the ones we will use are present in both versions.
As shown in the preceding screenshot, we can see the hierarchical structure of PostgreSQL having extensions, schemas which contain tables and functions, and roles.
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