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Functions for Manipulating Data in PostgreSQL

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Functions for Manipulating Data in PostgreSQL

Here you can access the tables used in the course. To access the table, you will need to specify the dvdrentals schema in your queries (e.g., dvdrentals.film for the film table and dvdrentals.country for the country table).


Note: When using sample integrations such as those that contain course data, you have read-only access. You can run queries, but cannot make any changes such as adding, deleting, or modifying the data (e.g., creating tables, views, etc.).

Take Notes

Add notes about the concepts you've learned and SQL cells with queries you want to keep.

Add your notes here

Explore Datasets

Use the different tables to explore the data and practice your skills!

  • Select the title, release_year, and rating of films in the film table.
    • Add a description_shortened column which contains the first 50 characters of the description column, ending with "...".
    • Filter the film table for rows where the special_features column contains "Commentaries".
  • Select the customer_id, amount, and payment_date from the payment table.
    • Extract date information from the payment_date column, creating new columns for the day, month, quarter, and year of transaction.
    • Use the rental table to include a column containing the number of days rented (i.e., time between the rental_date and the return_date).
  • Update the title column so that titles with multiple words are reduced to the first word and the first letter of the second word followed by a period.
    • For example:
      • "BEACH HEARTBREAKERS" becomes "BEACH H."
      • "BEAST HUNCHBACK" becomes "BEAST H."
    • Reformat your shortened title to title case (e.g., "BEACH H." becomes "Beach H.").
Unknown integration
DataFrameavailable as
df
variable
SELECT 
	title,
	release_year,
	rating,
	LEFT(description, 50) || '...' AS description_shortened
FROM dvdrentals.film
WHERE special_features LIKE '%Commentaries%'
This query is taking long to finish...Consider adding a LIMIT clause or switching to Query mode to preview the result.
Unknown integration
DataFrameavailable as
df1
variable
This query is taking long to finish...Consider adding a LIMIT clause or switching to Query mode to preview the result.
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