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SQL · Live · 1:1
SQL: joins & table relationships
Learn to understand join cardinality. Practise with Martin in a live online lesson.
Who this is for
Professionals building practical SQL skills. Basic SELECT queries.
A CLEAR HANDOVER
What you receive
- 90-minute one-to-one online lesson
- Practice examples created during the lesson
- A topic reference sheet and suggested exercises
HOW WE WORK
Scope, timing & delivery
Session or delivery timing: 90 minutes.
Request your preferred dates and time zone. Martin confirms availability before payment. Use your own licensed software where required. No accreditation or certification is implied.
For scheduled work, email your preferred dates, time zone and a short description of the problem. Martin confirms availability and a delivery date before payment. No guaranteed turnaround is advertised.
- Understand join cardinality
- Use inner and left joins
- Detect duplicates caused by joins
Know what happens next.
Confirm the details
Contact Martin with your goal. For services, agree scope, dates and the final price before payment.
Pay & receive your work
Pay through PayPal.Me. Martin verifies the payment manually, then delivers according to your agreement.