Import Export Tools

These tool just work with the raw data (the documents in the collection); they do not save, or load, the metadata like the defined indexes or (capped) collection properties. You will need to (re)create those yourself in a separate step, before loading that data. Vote here to change this.

mongoimport

This utility takes a single file that contains 1 JSON/CSV/TSV string per line and inserts it. You have to specify a database and a collection.

options:
            --help                  produce help message
            -v [ --verbose ]        be more verbose (include multiple times for more
            			    verbosity e.g. -vvvvv)
            -h [ --host ] arg       mongo host to connect to ("left,right" for pairs)
            -d [ --db ] arg         database to use
            -c [ --collection ] arg collection to use (some commands)
            -u [ --username ] arg   username
            -p [ --password ] arg   password
            --dbpath arg            directly access mongod data files in the given path,
            			    instead of connecting to a mongod instance - needs to
            			    lock the data directory, so cannot be used if a
            			    mongod is currently accessing the same path
            --directoryperdb        if dbpath specified, each db is in a separate
            directory
            -f [ --fields ] arg     comma seperated list of field names e.g. -f name,age
            --fieldFile arg         file with fields names - 1 per line
            --ignoreBlanks          if given, empty fields in csv and tsv will be ignored
            --type arg              type of file to import.  default: json (json,csv,tsv)
            --file arg              file to import from; if not specified stdin is used
            --drop                  drop collection first
            --headerline            CSV,TSV only - use first line as headers

mongoexport

This utility takes a collection and exports to either JSON or CSV. You can specify a filter for the query, or a list of fields to output.

Neither JSON nor TSV/CSV can represent all data types. Please be careful not to lose or change data (types) when using this. For full fidelity please use mongodump.

If you want to output CSV, you have to specify the fields in the order you want them.

Example

options:
            --help                  produce help message
            -v [ --verbose ]        be more verbose (include multiple times for more
            			    verbosity e.g. -vvvvv)
            -h [ --host ] arg       mongo host to connect to ("left,right" for pairs)
            -d [ --db ] arg         database to use
            -c [ --collection ] arg collection to use (some commands)
            -u [ --username ] arg   username
            -p [ --password ] arg   password
            --dbpath arg            directly access mongod data files in the given path,
            			    instead of connecting to a mongod instance - needs to
            			    lock the data directory, so cannot be used if a
            			    mongod is currently accessing the same path
            --directoryperdb        if dbpath specified, each db is in a separate
            directory
            -q [ --query ] arg      query filter, as a JSON string
            -f [ --fields ] arg     comma seperated list of field names e.g. -f name,age
            --csv                   export to csv instead of json
            -o [ --out ] arg        output file; if not specified, stdout is used

mongodump

This takes a database and outputs it in a binary representation. This is mostly used for doing hot backups of a database.

If you're using sharding and try to migrate data this way, this will dump shard configuration information and overwrite configurations upon restore.

options:
            --help                   produce help message
            -v [ --verbose ]         be more verbose (include multiple times for more
            			     verbosity e.g. -vvvvv)
            -h [ --host ] arg        mongo host to connect to ("left,right" for pairs)
            -d [ --db ] arg          database to use
            -c [ --collection ] arg  collection to use (some commands)
            -u [ --username ] arg    username
            -p [ --password ] arg    password
            --dbpath arg             directly access mongod data files in the given path,
            			     instead of connecting to a mongod instance - needs
            			     to lock the data directory, so cannot be used if a
            				     mongod is currently accessing the same path
            --directoryperdb         if dbpath specified, each db is in a separate
            directory
            -o [ --out ] arg (=dump) output directory

Example: Dumping Everything

To dump all of the collections in all of the databases, run mongodump with just the --host:

$ ./mongodump --host prod.example.com
            connected to: prod.example.com
            all dbs
            DATABASE: log    to   dump/log
            log.errors to dump/log/errors.bson
            713 objects
            log.analytics to dump/log/analytics.bson
            234810 objects
            DATABASE: blog    to    dump/blog
            blog.posts to dump/log/blog.posts.bson
            59 objects
            DATABASE: admin    to    dump/admin

You'll then have a folder called "dump" in your current directory.

If you're running mongod locally on the default port, you can just do:

$ ./mongodump

Example: Dumping a Single Collection

If we just want to dump a single collection, we can specify it and get a single .bson file.

$ ./mongodump --db blog --collection posts
            connected to: 127.0.0.1
            DATABASE: blog        to     dump/blog
            blog.posts to dump/blog/posts.bson
            59 objects

mongorestore

This takes the output from mongodump and restores it.

usage: ./mongorestore [options] [directory or filename to restore from]
            options:
            --help                  produce help message
            -v [ --verbose ]        be more verbose (include multiple times for more
            			    verbosity e.g. -vvvvv)
            -h [ --host ] arg       mongo host to connect to ("left,right" for pairs)
            -d [ --db ] arg         database to use
            -c [ --collection ] arg collection to use (some commands)
            -u [ --username ] arg   username
            -p [ --password ] arg   password
            --dbpath arg            directly access mongod data files in the given path,
            				    instead of connecting to a mongod instance - needs to
            				    lock the data directory, so cannot be used if a
            			    mongod is currently accessing the same path
            --directoryperdb        if dbpath specified, each db is in a separate
            directory
            --drop                  drop each collection before import
            --objcheck              validate object before inserting

Operation	Syntax	Description of Operation
Logical AND	a b c	Returns rows that contain a, b and c.
Logical OR	a \| b \| c	Returns rows that contain a, b, or c.
Logical NOT	a - b	Returns rows that contain a and not b.
hyphen with no space	a-b	Hyphen treated as a regular character. For example, if the hyphen is defined as skipjoin, words such as web-site are treated as the single query term website. Likewise, if the hyphen is defined as a printjoin, words such as web-site are treated as web site in the `CTXCAT` query language.
" "	"a b c"	Returns rows that contain the phrase "a b c". For example, entering "Sony CD Player" means return all rows that contain this sequence of words.
( )	(A B) \| C	Parentheses group operations. This query is equivalent to the `CONTAINS` query (A &B) \| C.
wildcard (right and double truncated)	term* a*b	The wildcard character matches zero or more characters. For example, do* matches dog, and gls* matches glass. Left truncation not supported. Note: Oracle recommends that you create a prefix index if your application uses wildcard searching. You set prefix indexing with the BASIC_WORDLIST preference.

TAG	Description	Possible Values
	Signals that this query be interpreted as a query template.
	Specify the query string.
grammar=	Specify the grammar of the query.	CONTEXT CTXCAT
	Specify the score preference
datatype=	Specify the type of number returned as score.	INTEGER FLOAT

	ALTER TABLE	INSERT
	CREATE	OPEN
	DELETE	REVOKE
	DROP	SELECT
	FETCH	TRUNCATE TABLE
	GRANT	UPDATE

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Mongodb Import Export Tools

Import Export Tools

mongoimport

mongoexport

mongodump

Example: Dumping Everything

Example: Dumping a Single Collection

mongorestore

Mongodb dbshell Reference

转mongodb入门

Mongodb Dynamic querys select

mysql常用的hint

Mysql innodb引擎优化

Oracle 10g Recycle Bin

ORACLE CTXCAT-CATSEARCH

CATSEARCH

About Performance

Limitation

Syntax

Query Template Specification

Examples

Create the Table

Create the CTXCAT Index

ORACLE JOBS

Oracle 分区�?Partition)

数据库性能常用SQL

SQL SERVER事务处理

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Mongodb Import Export Tools

Import Export Tools

mongoimport

mongoexport

mongodump

Example: Dumping Everything

Example: Dumping a Single Collection

mongorestore

Mongodb dbshell Reference

转mongodb入门

Mongodb Dynamic querys select

mysql常用的hint

Mysql innodb引擎优化

Oracle 10g Recycle Bin

ORACLE CTXCAT-CATSEARCH

CATSEARCH

About Performance

Limitation

Syntax

Query Template Specification

Examples

Create the Table

Create the CTXCAT Index

ORACLE JOBS

Oracle 分区�?Partition)

数据库性能 常用SQL

SQL SERVER事务处理

数据库性能常用SQL