Use EDA to find impossible scenarios

Calculate how many YellowTripData records have each type of error discovered during EDA.

Den här övningen är en del av kursen

Writing Functions and Stored Procedures in SQL Server

Övningsinstruktioner

Use CASE and COUNT to understand how many records contain the following errors:
DropOffDate before PickupDate, DropOffDate before today, PickupDate before today, TripDistance is zero.

Interaktiv övning med praktiskt arbete

Testa den här övningen genom att slutföra den här exempelkoden.

SELECT
	-- PickupDate is after today
	COUNT (CASE WHEN ___ > ___() THEN 1 END) AS 'FuturePickup',
    -- DropOffDate is after today
	COUNT (CASE WHEN ___ > ___() THEN 1 END) AS 'FutureDropOff',
    -- PickupDate is after DropOffDate
	COUNT (CASE WHEN ___ > ___ THEN 1 END) AS 'PickupBeforeDropoff',
    -- TripDistance is 0
	COUNT (CASE WHEN ___ = ___ THEN 1 END) AS 'ZeroTripDistance'  
FROM YellowTripData;

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