如何将字符串转换为日期数据类型? [英] How to convert from string to date data type?
问题描述
>
将数据从csv文件上传到MongoDB。它将 OrderDate
作为字符串数据类型,由于使用BI工具创建报表时遇到问题。
我的集合中有大约10000条记录。
I am uploading data from a csv file to MongoDB. It is taking OrderDate
as string data type due to which facing problems while creating reports using a BI tool.
I have about 10000 records in my collection.
任何人都可以帮助我如何更改数据类型 OrderDate
to Date with a single query?
Could anyone help me how can I change the data Type of OrderDate
to Date with a single query?
推荐答案
我不认为你可以用单个查询。最简单的方法是在插入期间使用 ISODate
函数将数据字符串转换为 Date
格式。但是,如果你想处理你已经插入的数据,你可以使用下面的代码使用mongodb控制台:
I don't think that you can change field's type with single query. The easiest way is to convert data strings into Date
format using ISODate
function during the insertion. But, if you want to process the data you already inserted, you can do it with the following code using mongodb console:
db.collection.find().forEach(function(element){
element.OrderDate = ISODate(element.OrderDate);
db.collection.save(element);
})
此代码将处理集合中的每个元素 collection
并将 Orderdate
字段的类型从 String
更改为日期
。
This code will process each element in your collection collection
and change the type of Orderdate
field from String
to Date
.
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