Explore table sizes
Let's start by exploring five related tables:
stackoverflow
: questions asked on Stack Overflow with certain tagscompany
: information on companies related to tags instackoverflow
tag_company
: linksstackoverflow
tocompany
tag_type
: type categories applied to tags instackoverflow
fortune500
: information on top US companies
Count the number of columns in a table by selecting a few rows and manually counting the columns in the result.
Which table has the most rows?
This exercise is part of the course
Exploratory Data Analysis in SQL
Hands-on interactive exercise
Turn theory into action with one of our interactive exercises
