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删除mongodb某个字段

大自然在召唤 2022-03-30 阅读 102
PS C:\Users\y'r> mongo -u jevy -p 112244
MongoDB shell version v4.4.10
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("3804af0b-fe26-4af7-88b6-8d4d56581bd2") }
MongoDB server version: 4.4.10
---
        Enable MongoDB's free cloud-based monitoring service, which will then receive and display
        metrics about your deployment (disk utilization, CPU, operation statistics, etc).

        The monitoring data will be available on a MongoDB website with a unique URL accessible to you
        and anyone you share the URL with. MongoDB may use this information to make product
        improvements and to suggest MongoDB products and deployment options to you.

        To enable free monitoring, run the following command: db.enableFreeMonitoring()
        To permanently disable this reminder, run the following command: db.disableFreeMonitoring()
---
> show dbs;
DE_AMZ  0.173GB
US_AMZ  4.060GB
admin   0.000GB
config  0.000GB
local   0.000GB
> use  US_AMZ;
switched to db US_AMZ
> db.WordsTagTable.update({},{"$unset":{"kinds":""}},{multi:true});
WriteResult({ "nMatched" : 1000000, "nUpserted" : 0, "nModified" : 1000000 })
>

删除前:
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删除后:

在这里插入图片描述

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