Tell me about a time you used SQL window functions and other advanced techniques to solve a case study, including working with tree-like data structures.
Use the supplied case-study tables to demonstrate your approach. Return each non-root node with its direct parent, approved event value, and rank among its siblings.
parent_id, parent_name, node_id, node_name, approved_value, and sibling_rank.parent_id, then sibling_rank, then node_id.| Column | Type | Description |
|---|---|---|
| node_idPK | INT | Unique identifier for a tree node |
| parent_id | INT | Immediate parent node identifier; NULL for roots |
| node_name | VARCHAR(100) | Display name of the node |
| Column | Type | Description |
|---|---|---|
| event_idPK | INT | Unique event identifier |
| node_id | INT | Node associated with the event |
| event_type | VARCHAR(40) | Category of the event |
| event_value | NUMERIC(12,2) | Value associated with the event |
| status | VARCHAR(20) | Event processing status |