## Syntax
```mermaid
%%{init: {
'theme': 'base',
'flowchart': { 'padding': '7', 'nodeSpacing': '20', 'rankSpacing': '20' },
'themeVariables': {
'fontSize': '11px',
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}}%%
flowchart LR
Start((START)) --> ZSTD_COMPRESS[ZSTD_COMPRESS]:::quoted
ZSTD_COMPRESS --> End((END))
```
## Purpose
The `ZSTD_COMPRESS` SQL function compresses a `blob` using the Zstandard-algorithm.
See also [[ZSTD_DECOMPRESS]] and [[ZLIB_COMPRESS]].
Parameters:
- input (`blob`): The `blob` to compress.
Returns: a Zstandard-compressed version of the input.
## Examples
The following example compresses and decompresses the nine ASCII characters `ACME` and retrieves the original text:
```sql
select blob_to_text(zstd_decompress(zstd_compress(ascii_to_blob('ACME'))))
-------------------
ACME
```
The following example compresses a text and retrieves the compressed `blob` encoded as base64:
```sql
select base64_encode(zstd_compress('VGhpcyBpcyBhIHZlcnkgbG9uZyB0ZXh0IHRvIHRlc3QgdGhlIFpzdGQgY29tcHJlc3Npb24gbWV0aG9k'))
-------------------
KLUv/SA8vQEAwsMMFLAnHd2OTKNtYpi2ISYmwTDAZCECxao8IzN3TMax4dILZvUeu/Ui7ASy4iTxWPjMZwoIAA==
```