mongodb show databases

: This article describes how to configure php and mongodb databases on Windows. if you are interested in the PHP Tutorial, refer to it. For PHP distributions of different thread security and VC versions, pre-compiled binary files can be obtained from PECL. Decompress the package and put php_cmd.dll in the PHP extension directory ("ext" by default "). Add the following content to the php. ini file:

Tags: go import final rom linkage host int div use preLinkage of Class 3 databases: MySQL, MongoDB, RedisFrom pymysql import *from pymongo import *from redis import *class MySQL (object): Def __init__ (self): Self.con = Connect (host= ' localhost ', port=3306, database= ' stu_info ', user= ' root ', password= ' MySQL ', charset= ' utf8 ') self.cur = Self.con.cursor () Self.flag = [

1. master-slave replication is the most common replication method for MongoDB. This method is flexible, the most basic setting method for backup, fault recovery, and read expansion is to create one master node and one or more slave nodes. Each slave node needs to know the address of the master node. After running mongodmaster, the master server is started. Run mongodslavesourcemaster_add 1. master-slave replication is the most common replication metho

Source: comparison of various nosql databases in http://hi.baidu.com/eastdoor/blog/item/758d0e3eedb5d92471cf6c14.html Cassandra, MongoDB, CouchDB, Redis, Riak, HBaseCouchDBDevelopment language: ErlangMain advantages: data consistency and ease of useLicense: ApacheProtocol: HTTP/RESTApplicable: accumulated, less changed data. Or a large number of versions are required.Example: CRM, CMS systems. multi-site de

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}, Collection Statistics: db.collection.stats () > Db. User.stats () { "ns": "Test. User, "Count": 3149352, "size": 226727736, NBS P "Avgobjsize": 71.9918688034872, "storagesize": 377905152, "numextents": +, "nindexes": 2, "Lastexten Tsize ": 104161280, " Paddingfactor ": 1.0000000000000004, " s Ystemflags ": 0, " UserFlags ": 0, " totalindexsize ": 1817443 "indexsizes": { "_id_": 10 2502512, "age_1

.--------------------------------------------------------------------------------------------------------------- -----------MongoDB has many roles built in, but be aware that not every database has the same built-in role. Where the admin database contains roles that some other databases do not have.Children familiar with Oracle are aware that there are two types of database users, one is administrator, to m

Tags: Shell file log method mod create about DEX fieldMongoDB stores BSON files as data records into the collection; The following is the collection in the database.First, DatabasesIn MongoDB, the database saves a document-style collection.In the MONGO shell, if you want to select a certain database to use, you can use the using command, as in the following example: Use MyDB 1.1 Creating a database Create a databasesIf the database doe

Tags: setting blog class Mon settings Ali imp must have aUse the Mongoengine module when using the MongoDB database in Djnago. In Settings, configure the database connection as follows: from Import connectconnect ('dbname1', host='127.0.0.1', port= 27017)The dbname1 is the name of the MongoDB database to be connected, and the host Ip,port the MongoDB database as

Tags: The conceptual relational database performs an insert email operation to get sudo dataNon-relational database command is case-sensitive; command Terminator is carriage return (unlike MySQL) MongoDB Configuration sudo service mongodb start mongo MongoDB Basic Concept 集合A concept that corresponds to a relational

Regular11 Regular Expressions-This data type is used to store regular expression JavaScript13 Code-This data type is used to store JavaScript code in the document Symbol14 Symbols-The data type is the same as the string, but it is usually reserved for language JavaScript that uses a particular symbol type ( withSCOPE) 15 code-This data type is used to store the scoped JavaScript code in the document32-bit Integer 16 32-bit integer-This type is used to store numeric Timestamp17 Time Stamp-easy t