FAQ: Usage Funnels - Results

Frequently Asked Questions SQL FAQ
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This community-built FAQ covers the “Results” exercise from the lesson “Usage Funnels”.

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This exercise can be found in the following Codecademy content:

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2

Can someone explain to me what this code means from the Funnels section of the Data Science Path: SELECT DISTINCT q.user_id,
h.user_id IS NOT NULL AS ‘is_home_try_on’,
h.number_of_pairs,
p.user_id IS NOT NULL AS ‘is_purchase’
FROM quiz q
LEFT JOIN home_try_on h
ON q.user_id = h.user_id
LEFT JOIN purchase p
ON p.user_id = q.user_id
LIMIT 10;

Thanks

1 Like
3

The exercise is to create a query from the quiz, home_try_on, purchase tables.

Start by querying one table first and then add the other tables one by one.

SELECT DISTINCT q.user_id,
               h.user_id IS NOT NULL AS ‘is_home_try_on’,  -- if the user_id is not null, return 1, else 0
               h.number_of_pairs,
               p.user_id IS NOT NULL AS ‘is_purchase’      -- if the user_id is not null, return 1, else 0
FROM quiz q
LEFT JOIN home_try_on h                                            -- outer join home_try_on table
            ON q.user_id = h.user_id
LEFT JOIN purchase p                                               -- outer join purchase table
            ON p.user_id = q.user_id
LIMIT 10;
2 Likes