src/Pagamento/Repository.php
public function sumValor()
    {
        $tableGateway = new TableGateway($this->tableName, $this->dbAdapter);
        $sql = $tableGateway->getSql();
        $select = $sql->select()->columns(array('sum' => new Expression('SUM(valor)')));
        return $tableGateway->selectWith($select)->current();
    }
public function sumValor()
    {
        $tableGateway = new TableGateway($this->tableName, $this->dbAdapter);
        $sql = $tableGateway->getSql();
        $select = $sql->select()->columns(array('sum' => new Expression('SUM(valor)')));
        return $tableGateway->selectWith($select)->current();
    }
public function sumValor ( ) { $ tableGateway = new TableGateway ( $ this -> tableName , $ this -> dbAdapter ) ; $ sql = $ tableGateway -> getSql ( ) ; $ select = $ sql -> select ( ) -> columns ( array ( 'sum' => new Expression ( 'SUM(valor)' ) ) ) ; return $ tableGateway -> selectWith ( $ select ) -> current ( ) ; }
Encontra  somados valores de todos os pagamentos no BD
Encontra somados valores de todos os pagamentos no BD