Question

我们需要存储多个事务数据集合（仅插入而不进行更新）。由于我对NoSQL DB的了解有限，我觉得Mongo DB是DB的简单而不错的选择。我的方法是否正确？

同样在查询时我将不得不在日期之间过滤记录。我找不到在Mongo集合中存储和过滤“日期”类型的正确示例。有人可以帮我正确地存储“日期”类型和编写过滤查询吗？

Answer 1

MongoDB可以轻松处理存储事务数据的要求。您日期的首选格式是将其以BSON Date格式存储在您的集合中，这样更易于查询和排序。使用＆＃34;新日期＆＃34;下面使用ISODate()包装器正确格式化日期。

示例：

use foo_test
db.foo.drop()
db.foo.insert(
      {Quote:"Many of life's failures are people who did not realize how close they were to success when they gave up.", 
      Author: "Thomas Edison",
      Date: new Date("1931-01-31")});

db.foo.insert(
      {Quote:"In this world nothing can be said to be certain, except death and taxes.", 
      Author: "Benjamin Frankin",
      Date: new Date("1789-11-13")});

db.foo.insert(
      {Quote:"Houston, we've had a problem here", 
      Author: "Jim Lovell - Apollo 13 Commander",
      Date: new Date("1970-04-15")});

db.foo.insert(
      {Quote:"There aren't many downsides to being rich, other than paying taxes and having relatives asking for money.", 
      Author: "Bill Murray",
      Date: new Date("2005-03-14")});

查找具有特定日期的文档的示例查询，该日期仅返回样本数据的1个文档：

db.foo.find({Date: ISODate("1931-01-31")}).pretty();

{
    "_id" : ObjectId("57e0a749e4901a8bc1ab69f6"),
    "Quote" : "Many of life's failures are people who did not realize how close they were to success when they gave up.",
    "Author" : "Thomas Edison",
    "Date" : ISODate("1931-01-31T00:00:00Z")
}

查询示例查找两个日期之间的所有文档，这些文档将返回样本数据的2个文档：

db.foo.find({Date:{$gte:ISODate("1931-01-31"),$lte:ISODate("1970-05-01")}}).pretty();

{
    "_id" : ObjectId("57e0a749e4901a8bc1ab69f6"),
    "Quote" : "Many of life's failures are people who did not realize how close they were to success when they gave up.",
    "Author" : "Thomas Edison",
    "Date" : ISODate("1931-01-31T00:00:00Z")
}
{
    "_id" : ObjectId("57e0a749e4901a8bc1ab69f8"),
    "Quote" : "Houston, we've had a problem here",
    "Author" : "Jim Lovell - Apollo 13 Commander",
    "Date" : ISODate("1970-04-15T00:00:00Z")
}

用于事务数据库和日期操作的Mongo DB

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