SQL
List Functions
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|   |   |
|:--|:--------|
| **Description** |Works like sort, but the results are the indexes that correspond to the position in the original `list` instead of the actual values. |
| **Example** | `list_grade_up([30, 10, 40, 20])` |
| **Result** | `[2, 4, 1, 3]` |
| **Alias** | `array_grade_up` |