## Syntax
```mermaid
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'themeVariables': {
'fontSize': '11px',
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flowchart LR
Start((START)) --> DMETAPHONE[DxMETAPHONE]:::quoted
DMETAPHONE --> End((END))
```
## Purpose
The `DMETAPHONE` SQL function converts a value to the Metaphone code as defined on [Wikipedia](https://en.wikipedia.org/wiki/Metaphone).
Parameters:
- Input (`varchar2`): value to convert to double metaphone.
Returns: the four character double metaphone of the input as a `varchar2`.
## Examples
The following example retrieves the double metaphone of `fabulous`:
```sql
select dmetaphone('fabulous')
-------------------
FPLS
```
The following example retrieves the double metaphone of `success`:
```sql
select dmetaphone('success')
-------------------
SKSS
```