你可以使用 fetchField() 来获得单个记录. 例如:

     $nid))->fetchField();?>

//查询

     $uid));// 返回的结果是一个对象//通过一个foreach来进行输出foreach ($result as $record) {// Perform operations on $record->title, etc. here.// in this example the available data would be mapped to object properties:// $record->nid, $record->title, $record->created}

或者是(推荐方法)

while($record = $result->fetchassoc()){    //写你想要的    //那么输出的就是一个数组}

//对象，数组，值

     $uid)); // 对象$record = $result->fetchObject();// 数组$record = $result->fetchAssoc();// 只输出第一条数据$data = $result->fetchColumn(1); // Grabs the title 只输出第一个from the next row// Retrieve all records into an indexed array of stdClass objects.$result->fetchAll();// Retrieve all records as stdObjects into an associative array// keyed by the field in the result specified.// (in this example, the title of the node)$result->fetchAllAssoc(‘title’);// Retrieve a 2-column result set as an associative array of field 1 => field 2.$result->fetchAllKeyed();// Also good to note that you can specify which two fields to use// by specifying the column numbers for each field$result->fetchAllKeyed(0,2); // would be nid => created$result->fetchAllKeyed(1,0); // would be title => nid// Retrieve a 1-column result set as one single array.$result->fetchCol();// Column number can be specified otherwise defaults to first column$result->fetchCol($db_column_number);// Count the number of rows$result->rowCount();?>