One

```
@Documented
@Retention(RUNTIME)
@Target({})
public @interface One
```
The annotation that specify the nested statement for retrieving single object.

See Also:

Result, Results

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element	Description
`java.lang.String`	`columnPrefix`	Returns the columnPrefix.
`FetchType`	`fetchType`	Returns the fetch strategy for nested statement.
`java.lang.String`	`resultMap`	Returns the result map id used to map single object.
`java.lang.String`	`select`	Returns the statement id that retrieves single object.

- Element Detail
  - columnPrefix
```
java.lang.String columnPrefix
```
    Returns the columnPrefix.
    
    Returns:
    
    the columnPrefix.
    
    Since:
    
    3.5.5
    
    Default:
    
    ""
- - resultMap
```
java.lang.String resultMap
```
    Returns the result map id used to map single object.
    
    Returns:
    
    the result map id
    
    Since:
    
    3.5.5
    
    Default:
    
    ""
- - select
```
java.lang.String select
```
    Returns the statement id that retrieves single object.
    
    Returns:
    
    the statement id
    
    Default:
    
    ""
- - fetchType
```
FetchType fetchType
```
    Returns the fetch strategy for nested statement.
    
    Returns:
    
    the fetch strategy
    
    Default:
    
    org.apache.ibatis.mapping.FetchType.DEFAULT