MongoDB Installation and simple experiments

1.Windows installation of MongoDB

Http://www.mongodb.org/downloads download MSI, next step ...

After installation, to the installation directory of the bin directory execution Mongod start the database service, if not up, error "E:\data\db not found", create a corresponding folder, which is the folder to store the database.

Then start the MONGO database Shell client

2.mongo is a JavaScript interpreter that can run various JS commands directly, such as "x = 200,X/5";

You can also use the JS standard library, such as "Math.sin (MATH.PI/2);";

You can also customize the JS function, such as "function f (n) {return-n;} f (3);"

3.mongo view database, select Database

MONGO supports some non-JS extensions

such as db (view current database name), use DBNAME (switch database)

4.CRUD operation

A. Create:

Post = {"title": "Test", "name", "Yuhk", "Age": 18}

Db.yuhk.insert (POST)// This YUHK is not a database name?

B. Read

Db.yuhk.findOne ()

Db.yuhk.find ()

C. Update

Post.comment = ""//Add Comment field for post

Db.yuhk.update ({"title": "Test"},post)//The first parameter is a query condition, the second parameter is a modified value

After execution, add the Comment field to the original document

D. Delete

Db.yuhk.remove ({}); Delete all

Db.yuhk.remove ({"title": "Test"}); Delete by condition

MongoDB Installation and simple experiments