FAQ: Calculating Churn - Multiple Month: Create Months Temporary Table


#1

This community-built FAQ covers the “Multiple Month: Create Months Temporary Table” exercise from the lesson “Calculating Churn”.

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FAQs on the exercise Multiple Month: Create Months Temporary Table

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#2

FYI I had trouble with getting the answer to the first question:

"1.

We will be using the months as a temporary table (using WITH ) in the churn calculation.

Create the months temporary table using WITH and SELECT everything from it so that you can see the structure.

We need a table for January, February, and March of 2017."

I found the concept to be pretty simply, but was stumped for awhile. Turns out it was adding a few commas that I didn’t need. I thought I would convey that here:

WITH months AS (
SELECT STATEMENT (no comma at the end)
UNION
SELECT STATEMENT (no comma at the end)
UNION
SELECT STATEMENT (no comma at the end)
)
SELECT *
FROM months;