Explicitly converting types
While Redshift has a powerful type compatibility system, there will still be times when you need to convert one data type to another explicitly. Remember several of the functions use format strings, like WW represents the week of the year, DD the two digit day, MM the two digit month, YYYY the four digit year, and DAY represents the day's name.
Den här övningen är en del av kursen
Introduction to Redshift
Interaktiv övning med praktiskt arbete
Testa den här övningen genom att slutföra den här exempelkoden.
-- Select year_qtr from spectrumdb.ecommerce_sales.
SELECT year_qtr,
-- Convert percent_ecom to a decimal
___(___ ___ ___(4, ___)) AS percent_ecom_two_places
FROM spectrumdb.ecommerce_sales;