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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