upper_bound
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## upper_bound

### Function Details

    const_iterator upper_bound(const key_type &x) const

Find the least key greater than x.

#### Parameters

##### x

The target key to find.

#### Return Value

The valid iterator sitting on the key, or an invalid one.

#### See Also

http://www.cplusplus.com/reference/stl/multimap/upper_bound/

    iterator upper_bound(const key_type &x,
        bool readonly=false)

Find the least key greater than x.

#### Parameters

##### x

The target key to find.

##### readonly

Whether the returned iterator is readonly.

#### Return Value

The valid iterator sitting on the key, or an invalid one.

#### See Also

http://www.cplusplus.com/reference/stl/multimap/upper_bound/

### Group: Searching Functions

See of db_map's searching functions group for details about iterator, function version and parameters.

db_map

### Class

db_multimap

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