In this tutorial I will show main PostgreSQL data types such as Boolean, Character, Number, Temporal. Also I will describe when and how we can use them.
By the way, Postgres is not limited by the mentioned data types. It also supports such types like JSON, Monetary, Geometric, Network Addresses, etc. The full list of supported data types could be found here: Data Types
Boolean Data Type The boolean type (could be shortened to bool) can store only 2 possible values true or false and NULLin case when value is unknown.