MongoDB

One, backup data[Email protected] ~]# mongodump-h localhost-d admin-o/home/qiuyuetao/2017-08-10t16:07:51.188+0800writing Admin.system.users to 2017-08-10t16:07:51.188+0800done dumping admin.system.users (3 documents)

The MongoDB database provides a text index on the search query operation on top of the text content, and the text index can be applied to all fields of a string or character array. To use text search on a ruby driver, first create a text index using

First install the MONGODB server:1. Brew Install MongoDB2, modify the vim/usr/local/etc/mongod.conf file, DB Road strength　　3, create, modify/data/db, and for writable permission;4, start the service side. Brew Services Start MongoDBInstalling the

1. Download, installOfficial website Download: http://www.mongodb.org/downloadsafter the download, install it next:2. Create a Data folderMongoDB stores the Data folder under the DB folder.However, this data folder is not actively created and we

Phpvi /lib/systemd/system/php-fpm.service[unit]description=php-fpmafter=Network.target[service]type=Forkingexecstart =/etc/init.d/php-fpm-c/usr/local/php/etc/php.iniprivatetmp=true[Install]wantedby =multi-user.targetNginxvi /lib/systemd/system/nginx.

Original address: http://www.cnblogs.com/foxracle/p/3421893.htmlTo learn more about how MongoDB stores data, one concept must be clear, and that is memeory-mapped Files.memeory-mapped FilesShows how the database deals with the underlying system.

Code with the python2.7, crawl Xici free agent, detection into the database, for later crawler preparation. Directly below the code1 #-*-encoding=utf-8-*-2 3 ImportRequests4 fromlxmlImportetree5 Import Time6 ImportPymongo7

Compare Items MongoDB mysql/oracleTable Collection list Two-dimensional tables tableA row of data in a table document a record recordingTable Keys key Fields fieldField value Values value valuePrimary foreign Key No PK,FKVery high flexibility and

Previous wordsThis article will detail the MongoDB database on the deletion and modification of documentsInsert DocumentTo insert data into a MongoDB collection, you need to use MongoDB insert() or save() methods, as well as the Insertone () or

Aggregation refers to the various operations that can handle batch records and return results. MongoDB provides rich aggregation operations for performing calculation operations on datasets. Performing aggregation operations on an Mongod instance

Because you want to customize the installation location to configure MongoDB, you choose to use the manually installed MongoDB1. Install MongoDB installation package from official website2. Unzip the installation package and cut the unpacked package

Mongoexport export JSON or CSV format Mongoimport Import JSON or CSV Mongodump Export binary Bson structure data and index information Mongorestore Importing binary files Mongoexport-h 主机--port 端口号-u 用户名-p password-d 库名-c 表名-f field1

One, DB data operation (1) Help view command prompt help db.help (); Db.yourColl.help (); Db.youColl.find (). Help (); Rs.help (); (2) switch/CREATE database use Yourdb; When a collection (table) is

Database operations:// see which databases are available> Show DBSLocal 0.078GBMyDB 0.078GB//use operation will switch to a database If the database exists, it will switch directly If it does not exist then after the switchover, the first time you

Installation Environmentsystem Environment: Windows 10 64-bitApache version: 2.4.9PHP Version: 5.5.12MongoDB version: 3.2.6 wamp Version: Wamp 2.5 86-bit  Installation Stepsfirst, determine the PHP compiler and determine if PHP is a thread-safe

1. Recently there is a problem, that is, by date to find out the data, after tossing and finding that the date format of the stored data in MongoDB does not match the date format used in the query, causing the query to not come out// {"$and":

First step: Download the installation packageWe first need to download MongoDB's installation package, directly to the official website to download. The address is: https://www.mongodb.com/download-center#community.See if your operating system is 32-

Services run on the line will generate a large number of running and access logs, the log will contain some errors, warnings, and user behavior information, usually the service will be in the form of text log information, so readable, convenient for

MongoDB will present all user information in the collection System.users of the admin database, which mainly includes the user name, password, and database information. MongoDB does not enable authentication by default, as long as it can connect to

Study notes, used as database queries, original reference1 #!/usr/bin/env python2 #Coding:utf-83 #Author:--4 #Use of Purpose:mongodb5 #CREATED:2014/4/146 #32-bit versions can store up to 2.5GB of data (nosqlfan: Maximum file size 2G, production