Glossary term
What is Fan-out?
In Apex Flow Academy, "Fan-out" means: When a join repeats a row once for each matching row on the other side, which can inflate counts and totals. It is taught in SQL: Ask Any Database Any Question. Related terms include Grain, Subquery, LEFT JOIN and CTE (WITH). Every Apex Flow Academy course lists the official sources it checked.
- 1 course teaches it
- plain-word definition
The facts
What is Fan-out?
When a join repeats a row once for each matching row on the other side, which can inflate counts and totals.
Where is Fan-out taught?
Fan-out is defined in SQL: Ask Any Database Any Question.
Which terms are related to Fan-out?
Next to Fan-out in the course glossaries: Grain, Subquery, LEFT JOIN, CTE (WITH), INNER JOIN, Window function, Join and Transaction.
GrainSubqueryLEFT JOINCTE (WITH)INNER JOINWindow functionJoinTransaction
The hard questions, answered straight
Bold questions people really ask. Each answer comes from the course data or a settled Academy fact.
Do I need experience before I learn Fan-out?
It depends on the course. Each course that teaches it lists its own prerequisites, and all are listed at beginner level:
- SQL: Ask Any Database Any Question: No coding or database experience is needed.