mongodb remove item from collection

Long wanted to write an article MongoDB, suffering from wood has time, today I have learned the MongoDB knowledge integration, share out, part of MongoDB knowledge from the network. No link here, if there is infringement, please contact me in time ..

I. Mongodb introduction Mongo (www.mongodb.org) is a high-performance, open-source (DAI zhenjun daniu is studying Mongodb source code. You can go to www. cnblogs. comdaizhj), schema-free document-type database, which can be used in many scenarios to

Python's MongoDB module PyMongo operating method collection, mongodbpymongo Import the module before you start: >>> import pymongo Next, you must install and start the local mongodb server. The Connection established on the Consumer Client: Client =

Indexes can often greatly improve the efficiency of queries, and if there is no index, MongoDB must scan every file in the collection and select those records that meet the query criteria when reading the data. This scan full set of query efficiency

To use MongoDB, You need to import the following classes, not all of which are required.Import com. MongoDB. Mongo;Import com. MongoDB. dB;Import com. MongoDB. dbcollection;Import com. MongoDB. basicdbobject;Import com. MongoDB. dbobject;Import com.

Query:MySQL:Select * from userMongo:DB. User. Find () MySQL:Select * from user where name = 'starlil'Mongo:DB. User. Find ({'name': 'starlil '}) Insert:MySQL:Insert inot user ('name', 'age') values ('starlil', 25)Mongo:DB. User. insert ({'name':

Query:MySQL:SELECT * FROM userMongo:Db. user. find ()MySQL:SELECT * FROM user WHERE name = 'starlil'Mongo:Db. user. find ({'name': 'starlil '})Insert:MySQL:Insert inot user ('name', 'age') values ('starlil', 25)Mongo:Db. user. insert ({'name':

Query:MySQL:SELECT * FROM user Mongo:Db. user. find () MySQL:SELECT * FROM user WHERE name = 'starlil' Mongo:Db. user. find ({'name': 'starlil '}) Insert:MySQL:Insert inot user ('name', 'age') values ('starlil', 25) Mongo:Db. user. insert

This is a creation in Article, where the information may have evolved or changed. Plug-in storage engine API MONGODB3.0 introduced the plug-in storage Engine API, which makes it easy for third-party storage engine vendors to join MongoDB, a change

Directory:One . MongoDB Boot configuration Two . Export , import , run-time backup Three . Fsync lock , data repair Iv. . User Management , Security certification First, the startup item Mongod--helpC:\windows\system32>mongod--help1.