Question

我目前正在学习mongodb查询。我的收藏费用就像::

    {
    "_id" : ObjectId("59815d4704ca1760a45957ca"),
    "userEmail" : "lk@gmail.com",
    "expenseAmount" : -200,
    "expenseRemark" : "aa",
    "expenseCategory" : "billing",
    "transactionType" : "debit",
    "entryTime" : ISODate("2017-08-02T05:03:57Z"),
    "__v" : 0
}
{
    "_id" : ObjectId("59815d5404ca1760a45957cb"),
    "userEmail" : "lk@gmail.com",
    "expenseAmount" : -300,
    "expenseRemark" : "ff",
    "expenseCategory" : "transport",
    "transactionType" : "debit",
    "entryTime" : ISODate("2017-08-02T05:04:11Z"),
    "__v" : 0
}
{
    "_id" : ObjectId("5980191d04ca1760a45957cd"),
    "userEmail" : "lk@gmail.com",
    "expenseAmount" : -100,
    "expenseRemark" : "rr",
    "expenseCategory" : "billing",
    "transactionType" : "debit",
    "entryTime" : ISODate("2017-08-01T06:00:46Z"),
    "__v" : 0
}
{
    "_id" : ObjectId("5980192604ca1760a45957ce"),
    "userEmail" : "lk@gmail.com",
    "expenseAmount" : -200,
    "expenseRemark" : "qq",
    "expenseCategory" : "transport",
    "transactionType" : "debit",
    "entryTime" : ISODate("2017-08-01T06:01:03Z"),
    "__v" : 0
}
{
    "_id" : ObjectId("5980192e04ca1760a45957cf"),
    "userEmail" : "lk@gmail.com",
    "expenseAmount" : -470,
    "expenseRemark" : "ff",
    "expenseCategory" : "transport",
    "transactionType" : "debit",
    "entryTime" : ISODate("2017-08-01T06:01:11Z"),
    "__v" : 0
}
{
    "_id" : ObjectId("59816ac004ca1760a45957d0"),
    "userEmail" : "lk@gmail.com",
    "expenseAmount" : -500,
    "expenseRemark" : "raj",
    "expenseCategory" : "transport",
    "transactionType" : "debit",
    "entryTime" : ISODate("2017-08-02T06:01:26Z"),
    "__v" : 0
}
{
    "_id" : ObjectId("59816acb04ca1760a45957d1"),
    "userEmail" : "lk@gmail.com",
    "expenseAmount" : -100,
    "expenseRemark" : "pet",
    "expenseCategory" : "pets",
    "transactionType" : "debit",
    "entryTime" : ISODate("2017-08-02T06:01:37Z"),
    "__v" : 0
}
{
    "_id" : ObjectId("597d7a9c04ca1760a45957d2"),
    "userEmail" : "lk@gmail.com",
    "expenseAmount" : -500,
    "expenseRemark" : "gt",
    "expenseCategory" : "sports",
    "transactionType" : "debit",
    "entryTime" : ISODate("2017-07-30T06:20:04Z"),
    "__v" : 0
}
{
    "_id" : ObjectId("597d7aaa04ca1760a45957d3"),
    "userEmail" : "lk@gmail.com",
    "expenseAmount" : -560,
    "expenseRemark" : "mov",
    "expenseCategory" : "entertainment",
    "transactionType" : "debit",
    "entryTime" : ISODate("2017-07-30T06:20:14Z"),
    "__v" : 0
}
{
    "_id" : ObjectId("5983f28723485dd901791bc9"),
    "userEmail" : "lk@gmail.com",
    "expenseAmount" : 5560,
    "expenseRemark" : "income",
    "expenseCategory" : "entertainment",
    "transactionType" : "credit",
    "entryTime" : ISODate("2017-07-25T06:20:14Z"),
    "__v" : 0
}

我想要一个结果，我可以得到 expenseAmount 的总数，这是两个日期之间 entryTime 。

我正在尝试

    db.expenses.aggregate(
  {$match:{"entryTime":{$gt: new ISODate("2017-07-01T00:00:00Z") , $lt: new ISODate("2017-07-31T00:00:00Z")}}},
  {
    $group:{,
      _id : {total : {$sum : "$expenseAmount"}}

    }
  }
)

我尝试了几个不同的东西，但无法得到结果。但这不起作用。任何人都可以帮助我获得两个日期之间的费用总额。

EDIT-1

    db.expenses.aggregate(
  {$match:{"entryTime":{$gt: new ISODate("2017-07-01T00:00:00Z") , $lt: new ISODate("2017-07-31T00:00:00Z")}}},
  {"$group": {"_id": null, "total": { "$sum": "$expenseAmount"}}}
);

在Aggregate中使用日期过滤器，Mongodb

0 个答案: