In this module, we learned about tabular data
and how we can extract information from tables
of data using queries.
First, we learned that tabular data are data
that are organized into tables consisting
of rows and columns.
Next, we learned that observations are records
of observable phenomena, which are stored
on the rows.
Then, we learned that variables contain values
that vary across each observation, which are
stored on the columns.
Next, we learned that we can create relationships
between observations in two or more tables
by using primary and foreign keys.
Finally, we learned that queries allow us
to ask questions of tabular data and return
answers in the form of information.
In the next module, we’ll learn about the
data life cycle – the journey of data as it
is transformed from raw data to actionable