Ever Wondered How to Traverse Organizational Trees in SQL?
Whether it's Top-to-Bottom, Bottom-to-Top, or sorting using Sibling Order, mastering hierarchical queries can supercharge how you visualize and retrieve data from parent-child relationships.
Here's a visual guide to:
✅ Syntax of each type
✅ Example output
✅ Tree structure interpretation
✅ Bonus: ORDER SIBLINGS BY in action.
Note:
✔️ START WITH: Specifies the root node(s) of the hierarchy.
✔️CONNECT BY PRIOR: Defines the direction of traversal.
✔️LEVEL: A pseudocolumn indicating the depth of the node in the hierarchy.
✔️ORDER SIBLINGS BY: Sorts sibling rows (at the same level) based on one or more columns.
Perfect for those working with org charts, BOMs, or reporting hierarchies in Oracle.
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Which type of hierarchical query do you use most in your day-to-day work?
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