DatabasesBeginner

SQL & Databases

Ask better questions of your data.

Learn to query, filter, join, summarise and reshape relational data with NULL handling, CASE, CTEs, window functions, indexes and safe writes. Every lesson runs against a realistic learning-platform database.

16 lessons 42 hours Certificate included Self-paced

Start the first lesson Open lab View curriculum

Reviewed and updated October 2026 · Free to start

What you will learn

By the end, you can do this.

Write SELECT queries with confidence
Filter, sort and handle NULLs precisely
Join and summarise related data
Compose queries with subqueries, CTEs and window functions
Read query plans and change data safely
Build a reporting query you can reuse

Curriculum

16 lessons in 7 modules

464 practice drills included for extra repetition

0/16 complete

01Intro and SELECTUnderstand tables, rows and columns, then retrieve exactly what you need. Challenge 11 min 02Filtering and sortingCombine conditions, match patterns and order results predictably. Challenge 13 min

03Database design basicsLearn the building blocks of a database: tables, keys, and how records link together. Challenge 12 min 04Views and materialized viewsCreate reusable saved queries with views, and learn when a materialized view earns its keep. Challenge 10 min 05Transactions and lockingGroup statements into safe, all-or-nothing transactions and understand why the database locks rows. Challenge 12 min 06Debugging queriesSystematically narrow down and diagnose queries that return the wrong rows or none at all. Challenge 10 min

07JoinsCombine tables through keys, and know when each join type is appropriate. Challenge 16 min 08Aggregation and GROUP BYSummarise thousands of rows into the handful of numbers that matter. Challenge 14 min

09NULLs and COALESCETreat missing data deliberately instead of letting it break comparisons. Challenge 12 min 10CASE expressionsBranch inside a query to label rows, bucket values and sort custom orders. Challenge 12 min

11Subqueries and CTEsBuild a query from smaller, named results instead of one tangled statement. Challenge 14 min 12Window functionsRank and accumulate values without collapsing rows. Challenge 15 min

13Text and datesClean text and work with dates without guessing the dialect. Challenge 12 min 14Indexes and query plansRead how the engine executes a query and add the index that helps. Challenge 13 min 15Changing data safelyInsert, update and delete without losing rows you meant to keep. Challenge 14 min

16Project: course reportCombine joins, CTEs, windows and CASE in a reusable reporting query. Challenge 25 min

Certification

Finish the course. Prove the skill.

Complete every lesson, then pass a timed assessment to earn the SQL Fundamentals Certificate. Each credential has a unique ID and a QR code that resolves to a live public record.

16 randomized questions
32 minute limit · 80% to pass
3 attempts per enrolment
Verifiable by QR or credential ID

Certification details Verify a credential

Pro members get five certification attempts and unlimited timed mock exams. Compare Pro

EduByte.tech

EduByte · Skills certificationIssued 26 Oct 2026

This certifies that

Your name

has successfully completed the assessed program

SQL Fundamentals

Write SELECT queries with confidenceFilter, sort and handle NULLs preciselyJoin and summarise related data

SQL & Databases

By the end, you can do this.

16 lessons in 7 modules

Finish the course. Prove the skill.

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