Perfect! That's it for this part of the course. Let's have a short summary before we continue.

1. To find rows for three months starting from March 20, 2017, use:

   SELECT ... FROM ...
   WHERE column_name >= '2017-03-20' AND column_name < CAST('2017-03-20' AS DATE) + INTERVAL '3' month

2. To find rows for the current month, use:

   SELECT ... FROM ...
   WHERE column_name >= CAST(EXTRACT(year FROM CURRENT_TIMESTAMP) || '-' || EXTRACT(month FROM CURRENT_TIMESTAMP) || '-01' AS DATE)

   or use your database's built-in function if there is one:

   SELECT ... FROM ...
   WHERE column_name >= DATE_TRUNC('month', CURRENT_TIMESTAMP)

Okay, let's do a very short quiz before we conclude this part.