SQL
Text Functions and Operators
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|   |   |
|:--|:--------|
| **Description** |Extract substring of `length` characters starting from character `start`. Note that a `start` value of `1` refers to the `first` character of the string. |
| **Example** | `substring('Hello', 2, 2)` |
| **Result** | `el` |
| **Alias** | `substr` |