我想询问场地中的房间数量:这是我得到的:
ah:room <http://data.artsholland.com/venue/04df157e-fc47-4448-83ed-d0a8c577d7dd/room/3> -
ah:room <http://data.artsholland.com/venue/04df157e-fc47-4448-83ed-d0a8c577d7dd/room/ajax-foyer> -
ah:room <http://data.artsholland.com/venue/04df157e-fc47-4448-83ed-d0a8c577d7dd/room/ajaxbalkon> -
ah:room <http://data.artsholland.com/venue/04df157e-fc47-4448-83ed-d0a8c577d7dd/room/bovenzaal> -
ah:room <http://data.artsholland.com/venue/04df157e-fc47-4448-83ed-d0a8c577d7dd/room/foyer> -
ah:room <http://data.artsholland.com/venue/04df157e-fc47-4448-83ed-d0a8c577d7dd/room/grote-repetitielokaal>
接下来,我想获得多行回报。
ah:attachment <http://data.artsholland.com/venue/04df157e-fc47-4448-83ed-d0a8c577d7dd/attachment/1> -
ah:attachment <http://data.artsholland.com/venue/04df157e-fc47-4448-83ed-d0a8c577d7dd/attachment/2>
我已经搜索到实现这一点。找到了 group_concat 解决方案,但我想不通。