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SQL · Introduction

SQL Introduction

Run and explain your first PostgreSQL query in the browser. 4 cumulative lessons.

What you will be able to do

  • Run and explain your first PostgreSQL query in the browser.
  • Verify results on ordinary, missing-value and boundary data.

Access terms

Pay what you want, including nothing. Includes earlier SQL packages. Test checkout: no real charge is taken yet.

Every lesson can be read and checked without a payment. Passing the checks shows you what you can do; it does not certify a grade.