Glossary term
What is Join?
In Apex Flow Academy, "Join" means: A way to line up rows from two tables wherever a matching rule is true. It is taught in SQL: Ask Any Database Any Question and Data Analytics From Scratch: Answer Real Business Questions. Related terms include HAVING, INNER JOIN, GROUP BY and LEFT JOIN.
- 2 courses teach it
- plain-word definition
The facts
What is Join?
A way to line up rows from two tables wherever a matching rule is true. (From SQL: Ask Any Database Any Question. 1 other course defines it for their own subject, so each definition follows.)
What does Join mean in SQL: Ask Any Database Any Question?
A way to line up rows from two tables wherever a matching rule is true.
What does Join mean in Data Analytics From Scratch: Answer Real Business Questions?
Matching rows from two tables using a shared key so you can use columns from both.
Where is Join taught?
Join is defined in SQL: Ask Any Database Any Question and Data Analytics From Scratch: Answer Real Business Questions.
SQL: Ask Any Database Any QuestionData Analytics From Scratch: Answer Real Business Questions
Which lessons cover Join?
These lessons name it in their title or objectives:
- SQL: Ask Any Database Any Question, lesson 1.4: New Columns From Old: Calculations and AS
- SQL: Ask Any Database Any Question, lesson 4.1: INNER JOIN: Connect Two Tables
- SQL: Ask Any Database Any Question, lesson 4.2: Join Three or Four Tables
- SQL: Ask Any Database Any Question, lesson 4.3: LEFT JOIN: Keep Rows With No Match
- Data Analytics From Scratch: Answer Real Business Questions, lesson 4.2: Join a Second Table Without Losing or Doubling Rows
Which terms are related to Join?
Next to Join in the course glossaries: HAVING, INNER JOIN, GROUP BY, LEFT JOIN, Aggregate function, Grain, NULL, Fan-out, Percentage points and Correlation.
HAVINGINNER JOINGROUP BYLEFT JOINAggregate functionGrainNULLFan-outPercentage pointsCorrelation
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 Join?
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.
- Data Analytics From Scratch: Answer Real Business Questions: You can save and find a file on your computer.