## Syntax
```mermaid
%%{init: {
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'themeVariables': {
'fontSize': '11px',
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flowchart LR
Start((START)) --> ZERO_BLOB[ZERO_BLOB]:::quoted
ZERO_BLOB --> End((END))
```
## Purpose
The `ZERO_BLOB` SQL function generates a blob with 0-byte values.
See also [[RANDOM_BLOB]].
Parameters:
- Length (`int32`): Produce a blob with this length in terms of bytes.
Returns: A blob with 0-byte values.
## Examples
The following example generates a blob of 100 bytes with 0-byte values and retrieves the length in bytes:
```sql
select length(zero_blob(100))
-------------------
100
```
The following example shows that a null length evaluates to null:
```sql
select zero_blob(null)
-------------------
```