我有两个表格,事件和照片,它们通过'Event_ID'列关联在一起。我希望从每个事件中选择一张随机照片并显示它们。SQL Server - 选择一个不显示重复项的随机记录
我该怎么做?
我有以下显示所有相关的照片。我怎样才能限制每个事件一个?
SELECT Photos.Photo_Id, Photos.Photo_Path, Photos.Event_Id, Events.Event_Title,
Events.Event_StartDate, Events.Event_EndDate FROM Photos, Events
WHERE
Photos.Event_Id = Events.Event_Id AND
Events.Event_EndDate < GETDATE() AND
Events.Event_EndDate IS NOT NULL AND
Events.Event_StartDate IS NOT NULL
ORDER BY NEWID()
感谢
卢克斯特拉顿