shell語句:
var allpersons = db.persons.find()
while(allpersons.hasNext()){
var elemt = allpersons.next()
print(elemt.name)
}
while(allpersons.hasNext()){
var elemt = allpersons.next()
print(elemt.name)
}
遊標銷燬條件
客戶端傳來消息叫它銷燬
遊標迭代完畢
默認遊標超過10分鐘也會被清楚
查詢快照
有待進一步探究