MongoDB中如何大量插入
对于大量插入，请在MongoDB中使用insertMany()的概念。insertMany()将多个文档插入一个集合中。
让我们创建一个包含文档的集合-
> db.demo729.insertMany( [
... { BankName:"HDFC Bank",cardType:"Credit","CustomerName":[{Name:"Chris",Age:25}]},
... { BankName:"ICICI Bank",cardType:"Debit","CustomerName":[{Name:"Bob",Age:22}]},
... { BankName:"Kotak Bank",cardType:"Debit","CustomerName":[{Name:"David",Age:23}]}
... ] );
{
"acknowledged" : true,
"insertedIds" : [
ObjectId("5eac510d56e85a39df5f6333"),
ObjectId("5eac510d56e85a39df5f6334"),
ObjectId("5eac510d56e85a39df5f6335")
]
}在find()方法的帮助下显示集合中的所有文档-
> db.demo729.find().pretty();
这将产生以下输出-
{
"_id" : ObjectId("5eac510d56e85a39df5f6333"),
"BankName" : "HDFC Bank",
"cardType" : "Credit",
"CustomerName" : [
{
"Name" : "Chris",
"Age" : 25
}
]
}
{
"_id" : ObjectId("5eac510d56e85a39df5f6334"),
"BankName" : "ICICI Bank",
"cardType" : "Debit",
"CustomerName" : [
{
"Name" : "Bob",
"Age" : 22
}
]
}
{
"_id" : ObjectId("5eac510d56e85a39df5f6335"),
"BankName" : "Kotak Bank",
"cardType" : "Debit",
"CustomerName" : [
{
"Name" : "David",
"Age" : 23
}
]
}