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Introduction to SQL

Here you can access the books table used in the course.

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

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DataFrameas
books
variable
-- Add your own queries here
SELECT * 
FROM books
  1. Schemas 02:33 - 03:12

Now that we're familiar with data types, we can look at a database schema. Schemas are often referred to as "blueprints" of databases. A schema shows a database's design, such as what tables are included in the database and any relationships between its tables. A schema also lets the reader know what data type each field can hold. The schema for our library database shows the VARCHAR data type is used for strings like book title, author, and genre. We can also see that the patrons table is related to the checkouts table, but not the books table.

Explore Datasets

Use the books table to explore the data and practice your skills!

  • Select only the title column.
  • Alias the title column as book_title.
  • Select the distinct author names from the author column.
  • Select all records from the table and limit your results to 10.