## Syntax
```mermaid
%%{init: {
'theme': 'base',
'flowchart': { 'padding': '7', 'nodeSpacing': '20', 'rankSpacing': '20' },
'themeVariables': {
'fontSize': '11px',
'fontFamily': 'Arial'
}
}}%%
flowchart LR
Start((START)) --> ZLIB_COMPRESS[ZLIB_COMPRESS]:::quoted
ZLIB_COMPRESS --> End((END))
```
## Purpose
The `ZLIB_COMPRESS` SQL function compresses a BLOB using the Zlib-algorithm.
Parameters:
- input: The BLOB to compress.
Returns: a Zlib-compressed version of the input.