mongoexport

MongoDB: export distinct column value

由 余生颓废 提交于 2021-02-07 18:22:32
问题 Anyone have idea how to export distinct column value on mongodb using mongoexport command. Command: db.coll.distinct("uid"); The solution i have tried is : mongoexport --csv -d db -c collection -q '{distinct: "collection", "key": "uid"}' -f "uid" -o distinctUid.csv 回答1: It's not possible to do it this way. distinct is a database command, and --query option allows to use only a query to filter documents. If you are using mongodb v3.4 or later, you can use views to aggregate your collection and

MongoDB: export distinct column value

由 我与影子孤独终老i 提交于 2021-02-07 18:22:14
问题 Anyone have idea how to export distinct column value on mongodb using mongoexport command. Command: db.coll.distinct("uid"); The solution i have tried is : mongoexport --csv -d db -c collection -q '{distinct: "collection", "key": "uid"}' -f "uid" -o distinctUid.csv 回答1: It's not possible to do it this way. distinct is a database command, and --query option allows to use only a query to filter documents. If you are using mongodb v3.4 or later, you can use views to aggregate your collection and

MongoDB: export distinct column value

由 眉间皱痕 提交于 2021-02-07 18:22:02
问题 Anyone have idea how to export distinct column value on mongodb using mongoexport command. Command: db.coll.distinct("uid"); The solution i have tried is : mongoexport --csv -d db -c collection -q '{distinct: "collection", "key": "uid"}' -f "uid" -o distinctUid.csv 回答1: It's not possible to do it this way. distinct is a database command, and --query option allows to use only a query to filter documents. If you are using mongodb v3.4 or later, you can use views to aggregate your collection and

how to export mongodb without any wrapping with NumberInt(…)?

由 青春壹個敷衍的年華 提交于 2021-02-07 07:31:01
问题 I want to export mongodb as json, here is a record: {"_id":{"$oid":"554f042c0e81bf483e4a4e2f"}, "batch":"3","bz":NumberInt(1)} the problems is when I use json to loads it: json.loads('{"_id":{"$oid":"554f042c0e81bf483e4a4e2f"}, "batch":"3","bz":NumberInt(1)}') it returns ValueError: No JSON object could be decoded . This is because json can not deal with NumberInt(1) . So how can I translate NumberInt(1) to 1 when I export? 回答1: [UPDATE] IF your mongo collection does not include NumberInt,

how to export mongodb without any wrapping with NumberInt(…)?

由 帅比萌擦擦* 提交于 2021-02-07 07:30:18
问题 I want to export mongodb as json, here is a record: {"_id":{"$oid":"554f042c0e81bf483e4a4e2f"}, "batch":"3","bz":NumberInt(1)} the problems is when I use json to loads it: json.loads('{"_id":{"$oid":"554f042c0e81bf483e4a4e2f"}, "batch":"3","bz":NumberInt(1)}') it returns ValueError: No JSON object could be decoded . This is because json can not deal with NumberInt(1) . So how can I translate NumberInt(1) to 1 when I export? 回答1: [UPDATE] IF your mongo collection does not include NumberInt,

Mongoexport to multiple csv files

由 佐手、 提交于 2020-06-12 09:12:00
问题 I have a large mongoDB collection. I want to export this collection to CSV so I can then import it in a statistics package to do data analysis. The collection has about 15 GB of documents in it. I would like to split the collection into ~100 equally sized CSV files. Is there any way to achieve this using mongoexport? I could also query the whole collection in pymongo, split it and write to csv files manually, but I guess this would be slower and would require more coding. Thank you for input.

MongoDB: Issue when using mongoexport with --query option

由 夙愿已清 提交于 2020-03-21 04:52:53
问题 When I try to take backup with mongoexport using the --query option to get the documents whose status is equal to A, facing the below error: mongoexport --port 27017 --db ex --collection A --type=csv --fields _id,status --query '{"status":"A"}' -o eg.csv error validating settings: query ''{status:A}'' is not valid JSON Please let me know how to use --query option. 回答1: Assuming you run this from the DOS command prompt, you need to swap the single and double quotes. You need to wrap the entire

MongoDB: Issue when using mongoexport with --query option

由 懵懂的女人 提交于 2020-03-21 04:52:30
问题 When I try to take backup with mongoexport using the --query option to get the documents whose status is equal to A, facing the below error: mongoexport --port 27017 --db ex --collection A --type=csv --fields _id,status --query '{"status":"A"}' -o eg.csv error validating settings: query ''{status:A}'' is not valid JSON Please let me know how to use --query option. 回答1: Assuming you run this from the DOS command prompt, you need to swap the single and double quotes. You need to wrap the entire

Use mongoexport with a --query for ISODate

由 我的未来我决定 提交于 2020-03-13 06:08:26
问题 I have this query but i´m getting a syntax error: unexpected identifier mongoexport --db ium --collection events \ --query 'db.events.find({'created_at' : { $gte: ISODate("2016-03-01T00:00:00.001Z"), $lte: ISODate("2016-03-29T23:59:59:59.000Z") }, "name" : "UPDATE_SUCCESS"})' \ --out guille1_test.json what can it be wrong? 回答1: You need to use "extended json" in queries with mongoexport. So the way to specify "dates" is with $date instead. And the --query is just the "query string" in JSON

MongoDB数据备份恢复

由 左心房为你撑大大i 提交于 2020-01-17 13:52:13
备份恢复工具介绍 （1）** mongoexport/mongoimport （2）***** mongodump/mongorestore 应用场景总结: mongoexport/mongoimport:json csv 1、异构平台迁移 mysql <---> mongodb 2、同平台，跨大版本：mongodb 2 ----> mongodb 3 mongodump/mongorestore 日常备份恢复时使用. mongoexport具体用法如下所示： $ mongoexport --help 参数说明： -h:指明数据库宿主机的IP -u:指明数据库的用户名 -p:指明数据库的密码 -d:指明数据库的名字 -c:指明collection的名字 -f:指明要导出那些列 -o:指明到要导出的文件名 -q:指明导出数据的过滤条件 --authenticationDatabase admin 1.单表备份至json格式 例：备份itemtest库下的sec表 mongoexport -uroot -proot123 --port=27017 --authenticationDatabase admin -d itemtest -c sec -o /mongodb/log.json 注：备份文件的名字可以自定义，默认导出了JSON格式的数据。 2. 单表备份至csv格式
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