## Syntax
```mermaid
%%{init: {
'theme': 'base',
'flowchart': { 'padding': '7', 'nodeSpacing': '20', 'rankSpacing': '20' },
'themeVariables': {
'fontSize': '11px',
'fontFamily': 'Arial'
}
}}%%
flowchart LR
Start((START)) --> SUBSTR[SUBSTR]:::quoted
SUBSTR --> End((END))
```
## Purpose
The `SUBSTR` SQL function gets a substring from the input.
Parameters:
- Input: text to gather the substring from.
- Start: start position.
- Lenght: maximum lenght of the substring.
Returns: the substring from the original input.