Learn SQL for free with SQLite, original business datasets, joins, aggregation, explained quizzes and a checked reporting project. Work through connected modules with original READY teaching, realistic cases, worked examples and knowledge checks.
Practice with the supplied evidence, compare your reasoning with the explanations, and keep useful ideas in your private notes. Work at your own pace and return to your saved place.
Lessons are included with a free READY account. Training completion is separate from job-role certification and vendor credentials. Check the member course page for current completion-certificate availability.
WHAT YOU’LL PRACTICE
Capabilities you can put to work.
Distinguish a database, table, row, column and primary key. Run a read-only SELECT in the supplied practice database. Preserve identifiers and money units.
Combine WHERE conditions with explicit logical grouping. Sort with a deterministic tie-breaker before limiting. Distinguish a row filter from a data change.
Recognize NULL as missing or unknown rather than zero. Use IS NULL and distinguish COUNT(*) from COUNT(column). Apply COALESCE only with a justified business rule.
Use aggregate functions and GROUP BY at the requested grain. Separate WHERE row filtering from HAVING group filtering. Distinguish gross totals, known net and averages.
Match rows with an explicit key and choose INNER or LEFT JOIN. Check right-side key uniqueness before trusting a total. Keep unmatched records visible in a reconciliation.
Use CASE to label categories without rewriting source data. Use a CTE to separate filtering from reporting. Verify totals across labeled output groups.
Design checks for duplicates, missing matches and boundary cases. Use parameters rather than concatenating untrusted values. Verify AI output against known results and query scope.
Assemble a complete query and explain its output. Document limitations, units and reconciliation. Describe practice work honestly in an interview.
YOUR COURSE OUTLINE
Course Modules
Review each module’s focus before you sign in. Your account shows which learning activities are currently available.
01
Read and filter reliable records
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Establish the row grain, units and a repeatable read-only query before narrowing the result.
02
Handle gaps and summarize correctly
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Keep unknown facts visible, then aggregate at the grain and denominator the question requires.
03
Connect tables and build a report
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Choose a join, verify its grain and organize a readable regional summary.
04
Test and verify assisted SQL
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Challenge plausible results with independent controls and safe value handling.
05
Finish your SQL work sample
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Produce a repeatable result and explain its evidence and limits.
Who this course is for
Job seekers building data skills
Beginning analysts
Operations and reporting professionals
Before you start
Basic computer skills; SQLite 3 for optional local hands-on execution. Reading and checks require no software installation.
Work through the modules at a pace that lets you reflect and apply what you learn.
Know what’s included.
Is this training free, and how do I start?
The course overview is public. Sign in with a free READY account to use all 5 guided modules and save your progress. A free account is required to start learning. Existing members can sign in.
Does completing training mean I am certified?
No. Course completion and an optional READY learning certificate are separate from READYScore job-role certification. The member experience shows certificate eligibility and the existing READY$ policy.
Is this an official vendor course or credential?
Original, independent READY training. No vendor endorsement, external credential or hiring outcome is claimed. Training does not guarantee exam success or confer a vendor credential.
Does this assert learning hours or CEU/CPE eligibility?
The member course page shows the current estimated learning time and certificate eligibility. READY learning records do not guarantee that an outside provider will accept CEU/CPE credit; check that provider’s requirements. Existing certificate records are preserved.
Is this course free?
The lessons, knowledge checks and supplied practice resources are available with a free READY account. Course completion and a separate READY Certification are different.
Do I need to install software?
Basic computer skills; SQLite 3 for optional local hands-on execution. Reading and checks require no software installation.
Will this award a certification or guarantee a job?
No. This is original READY training with a fictional practice project. It does not issue a vendor credential, automatically award a READY Certification or guarantee hiring.
