Citus Blog

In our previous Fun with SQL post on the Citus Data blog, we covered window functions. Window functions are a special class of function that allow you to grab values across rows and then perform some logic. By jumping ahead to window functions, we missed so many of the other handy functions that exist within Postgres natively. There are in fact several hundred built-in functions. And when needed, you can also create your own user defined functions (UDFs), if you need something custom. Today we're going to walk through just a small sampling of SQL functions that can be extremely handy in PostgreSQL.