MongoDB beginner (1): configuration environment, mongodb beginner

MongoDB beginner (1): configuration environment, mongodb beginner

I. mongoDB Installation

1. First download the installation package http://www.mongodb.org/on the official MongoDB website /. Download the SDK based on your operating system.

2. Create two directories on the hard disk to differentiate the mongoDB installation files and data files. For example, I have created the following directories:

D: \ mongodb and D: \ mongodbdata

Decompress the downloaded installation package and copy the decompressed content to D: \ mongodb.

3. Start CMD (win + R key, CMD) to switch to the bin folder in D: \ mongodb.

Run mongod.exe -- dbpath D: \ mongodbdata to install the database.

4. Configure environment variables. Add D: \ mongodb \ bin to path

5. You can enter mongod-help in CMD to view mongdb help.

Ii. Start the database

Create a bat file (enable the database file ):

Input content: mongod -- dbpath D: \ mongodbdata

Create a new bat file (Database Operation file ):

Input: mongo 127.0.0.1: 27017/admin

The port number for accessing the database through the URL 127.0.0.1 is 27017 (default port) and accessed by the admin user

Iii. database comparison

Iv. Simple database operations

1. Create a database use [dbName]

[DbName] indicates the name of the database. The database will not be saved if no operation is performed on the database after the database is created.

2. Add a set to the database (which can be understood as a new table) and add records (add data to the table)

Db. persons. insert ({name: "zhangsan "})

3. query all databases

Show dbs

4. query documents in the database

Show collections

5. query data in database documents

Use the find () method or findOne () method

6. Modify the database

Db. persons. update ({name: "extjs4.0" },{$ set: {name: "extjs4.1 "}})

Similar
Update persons set name = 'extjs4. 1 'where name = 'extjs4. 0'

7. delete data

Db. persons. remove ({name: "extjs4.0 "})

Example:

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