Self-Join

The table joins itself when the question compares rows to other rows

The table joins itself when the question compares rows to other rows

Category

SQL

Difficulty

advanced

Duration

25 minutes

Challenges

0 hands-on challenges

Topics covered: Two Rows, Same Table, Different Meaning, Aliasing and the Join Condition, Directional Pairs and Double-Counting, Self-Join vs Window Function, Hierarchical Self-Joins and Depth

Lesson Sections

1. Two Rows, Same Table, Different Meaning

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2. Aliasing and the Join Condition

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3. Directional Pairs and Double-Counting

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4. Self-Join vs Window Function

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5. Hierarchical Self-Joins and Depth

   Content coming soon.