Relational Databases Certification
PostgreSQL, Bash scripting and Git in a real Linux terminal; five database projects and a closed-book exam earn a free certificate.
- Provider
- freeCodeCamp
- Section
- Databases & SQL
- Price
- Free
About this course
PostgreSQL, Bash scripting and Git in a real Linux terminal; five database projects and a closed-book exam earn a free certificate.
Where to take it
Free
no fee for the course or the certificate
No affiliate relationship with freeCodeCamp. We earn nothing from this link; it is here because the course is worth knowing about.
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Concepts behind this area
Data Warehouse
A data warehouse is a database built for analysis rather than for running the business: it holds copies of records from many operational systems, integrated under one set of definitions, kept as history rather than overwritten, and arranged so that questions across years and departments run fast.
Data Lake
A data lake is a store that keeps data in its original form, files of any shape in cheap object storage, loaded before anyone has decided what questions will be asked of it, so that the structure is applied when the data is read rather than when it is written.
Business Intelligence (BI)
Business intelligence is the practice and the tooling for turning an organisation's data into reports and dashboards that people use to run it: connecting to the sources, modelling the data into measures everyone agrees on, and presenting it so that a manager sees the state of the business without asking an analyst.
The field, explained: Data & Analytics
Wider context: all fields, the glossary and certification exams.
Last updated 26 September 2026 · Getting Digital