oracle数据表加载进ArcMap为什么select by attributes 不能用，是灰色的

oracle数据表加载进ArcMap为什么select by attributes 不能用，是灰色的<br>而excel表就能用<br><br><br><br><img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" /><img src="images/post/smile/dvbbs/em12.gif" />