MongoDB如何将集合下的某个数据段统一更新为同一数据。

Question

集合col下数据{"name" : "xiaoming""school" : "6",}{"name" : "xiaohong""school" : "10",}{"name" : "xiaoqiang""school" : "1",}怎么把所有的school统一改为5？网上找来找去，并没有人提到如何把数据段改为同一个数据。只能求大神指教了

Answer 1

db.col.update({}, {$set: {"school": 5}}, {multi: true})

Answer 2

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