Here is a list of all documented class members with links to the class documentation for each member:

- u -

• unique() : mongocxx::options::index
• unwind() : mongocxx::pipeline
• update() : mongocxx::model::update_many , mongocxx::model::update_one
• update_many() : mongocxx::collection , mongocxx::model::update_many
• update_one() : mongocxx::collection , mongocxx::model::update_one
• upsert() : mongocxx::model::replace_one , mongocxx::model::update_many , mongocxx::model::update_one , mongocxx::options::find_one_and_replace , mongocxx::options::find_one_and_update , mongocxx::options::update
• upserted_count() : mongocxx::result::bulk_write
• upserted_id() : mongocxx::result::replace_one , mongocxx::result::update
• upserted_ids() : mongocxx::result::bulk_write
• uri() : mongocxx::client , mongocxx::uri
• use_cursor() : mongocxx::options::aggregate
• username() : mongocxx::uri