一、导出工具mongoexport 简介,通过帮助先了解下mongoexport的功能参数
mongoexport --help
Usage:
mongoexport <options>
Export data from MongoDB in CSV or JSON format.
See http://docs.mongodb.org/manual/reference/program/mongoexport/ for more information.
general options:
--help print usage
--version print the tool version and exit
verbosity options:
-v, --verbose more detailed log output (include multiple times for more verbosity, e.g. -vvvvv)
--quiet hide all log output
connection options:
-h, --host= mongodb host to connect to (setname/host1,host2 for replica sets)
--port= server port (can also use --host hostname:port)
authentication options:
-u, --username= username for authentication
-p, --password= password for authentication
--authenticationDatabase= database that holds the user's credentials
--authenticationMechanism= authentication mechanism to use
namespace options:
-d, --db= database to use
-c, --collection= collection to use
output options:
-f, --fields= comma separated list of field names (required for exporting CSV) e.g. -f "name,age"
--fieldFile= file with field names - 1 per line
--type= the output format, either json or csv (defaults to 'json')
-o, --out= output file; if not specified, stdout is used
--jsonArray output to a JSON array rather than one object per line
--pretty output JSON formatted to be human-readable
querying options:
-q, --query= query filter, as a JSON string, e.g., '{x:{$gt:1}}'
-k, --slaveOk allow secondary reads if available (default true)
--forceTableScan force a table scan (do not use $snapshot)
--skip= number of documents to skip
--limit= limit the number of documents to export
--sort= sort order, as a JSON string, e.g. '{x:1}'
关键参数说明:
- -h,--host :代表远程连接的数据库地址,默认连接本地Mongo数据库;
- --port:代表远程连接的数据库的端口,默认连接的远程端口27017;
- -u,--username:代表连接远程数据库的账号,如果设置数据库的认证,需要指定用户账号;
- -p,--password:代表连接数据库的账号对应的密码;
- -d,--db:代表连接的数据库;
- -c,--collection:代表连接数据库中的集合;
- -f, --fields:代表集合中的字段,可以根据设置选择导出的字段;
- --type:代表导出输出的文件类型,包括csv和json文件;
- -o, --out:代表导出的文件名;
- -q, --query:代表查询条件;
- --skip:跳过指定数量的数据;
- --limit:读取指定数量的数据记录;
- --sort:对数据进行排序,可以通过参数指定排序的字段,并使用 1 和 -1 来指定排序的方式,其中 1 为升序排列,而-1是用于降序排列,如sort({KEY:1})。
注意:
当查询时同时使用sort,skip,limit,无论位置先后,最先执行顺序 sort再skip再limit。
实例:
mongoexport --authenticationDatabase=admin -h 127.0.0.1:28001 -u "user" -p "password" -d dbname -c keyword -o /opt/keyword.json --type json -f 字段1,字段2,字段3,字段4
二 、附带liunx scp参考
scp -p 文件path "host":/opt/ # 前是本机 后边是传送给谁的机器
三、导入工具mongoimport 简介,通过帮助先了解下mongoimport的功能参数
mongoimport --help
Usage:
mongoimport <options> <file>
Import CSV, TSV or JSON data into MongoDB. If no file is provided, mongoimport reads from stdin.
See http://docs.mongodb.org/manual/reference/program/mongoimport/ for more information.
general options:
--help print usage
--version print the tool version and exit
verbosity options:
-v, --verbose more detailed log output (include multiple times for more verbosity, e.g. -vvvvv)
--quiet hide all log output
connection options:
-h, --host= mongodb host to connect to (setname/host1,host2 for replica sets)
--port= server port (can also use --host hostname:port)
authentication options:
-u, --username= username for authentication
-p, --password= password for authentication
--authenticationDatabase= database that holds the user's credentials
--authenticationMechanism= authentication mechanism to use
namespace options:
-d, --db= database to use
-c, --collection= collection to use
input options:
-f, --fields= comma separated list of field names, e.g. -f name,age
--fieldFile= file with field names - 1 per line
--file= file to import from; if not specified, stdin is used
--headerline use first line in input source as the field list (CSV and TSV only)
--jsonArray treat input source as a JSON array
--type= input format to import: json, csv, or tsv (defaults to 'json')
ingest options:
--drop drop collection before inserting documents
--ignoreBlanks ignore fields with empty values in CSV and TSV
--maintainInsertionOrder insert documents in the order of their appearance in the input source
-j, --numInsertionWorkers= number of insert operations to run concurrently (defaults to 1)
--stopOnError stop importing at first insert/upsert error
--upsert insert or update objects that already exist
--upsertFields= comma-separated fields for the query part of the upsert
--writeConcern= write concern options e.g. --writeConcern majority, --writeConcern '{w: 3, wtimeout: 500, fsync: true, j: true}' (defaults to 'majority')
关键参数说明:
- h,--host :代表远程连接的数据库地址,默认连接本地Mongo数据库;
- --port:代表远程连接的数据库的端口,默认连接的远程端口27017;
- -u,--username:代表连接远程数据库的账号,如果设置数据库的认证,需要指定用户账号;
- -p,--password:代表连接数据库的账号对应的密码;
- -d,--db:代表连接的数据库;
- -c,--collection:代表连接数据库中的集合;
- -f, --fields:代表导入集合中的字段;
- --type:代表导入的文件类型,包括csv和json,tsv文件,默认json格式;
- --file:导入的文件名称
- --headerline:导入csv文件时,指明第一行是列名,不需要导入;
实例演示:
mongoimport --authenticationDatabase=admin -h 127.0.0.1:28001 -u "user" -p "password" -d dbname-c keyword --upsert --drop /opt/keyword.json