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Introduction to SQL

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

Take Notes

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

SQL flavor

  • Free and Pay
  • Used Relational Database
  • Vast majority of Keywords are the same
  • all follow universal standar

Create a view CREATE VIEW table_view AS SElect name FROM book

Query are called often result set Schemas are like bluePrint of database

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DataFrameas
books
variable
-- Add your own queries here

SELECT DISTINCT author AS unique_author
FROM books

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.
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DataFrameas
df
variable
SELECT  DISTINCT author AS unique_autor, title AS book_title
FROM books
LIMIT 10
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DataFrameas
df
variable
int = length