如何使用 MongoDB 计算时间戳的小时差?
mongodbdatabasebig data analytics更新于 2026/2/16 21:37:17
要计算时间戳的小时差，请使用聚合框架。首先，我们创建一个包含文档的集合−
> db.timestampDifferenceDemo.insertOne({
"MovieBeginningTime": new ISODate("2019-05-12 10:20:30"),
"MovieEndingTime":new ISODate("2019-05-12 12:30:20")
});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd7ba1f6d78f205348bc644")
}
> db.timestampDifferenceDemo.insertOne({
"MovieBeginningTime": new ISODate("2019-05-12 04:00:00"),
"MovieEndingTime":new ISODate("2019-05-12 07:10:00")
});
{
"acknowledged" : true,
"insertedId" : ObjectId("5cd7ba3b6d78f205348bc645")
}
以下是使用 find() 方法显示集合中的所有文档的查询 −
> db.timestampDifferenceDemo.find().pretty();
这将产生以下输出 −
{
"_id" : ObjectId("5cd7ba1f6d78f205348bc644"),
"MovieBeginningTime" : ISODate("2019-05-12T10:20:30Z"),
"MovieEndingTime" : ISODate("2019-05-12T12:30:20Z")
}
{
"_id" : ObjectId("5cd7ba3b6d78f205348bc645"),
"MovieBeginningTime" : ISODate("2019-05-12T04:00:00Z"),
"MovieEndingTime" : ISODate("2019-05-12T07:10:00Z")
}
以下是计算 MongoDB 中时间戳差异的查询(以小时为单位) −
> db.timestampDifferenceDemo.aggregate([
{$project: {
DifferenceInHours: {$divide: [{$subtract: ["$MovieEndingTime", "$MovieBeginningTime"]}, 3600000]}
}}
]);
这将产生以下输出 −
{ "_id" : ObjectId("5cd7ba1f6d78f205348bc644"), "DifferenceInHours" : 2.1638888888888888 }
{ "_id" : ObjectId("5cd7ba3b6d78f205348bc645"), "DifferenceInHours" : 3.1666666666666665 }
