013 exercise file updated tủ tài liệu training

1) Creating First Database
//below is the syntax for creating database. Here database name is m
​ yblogs
use myblogs;
// creating first ​collection ​in the database m
​ yblogs​. Here, ​collection ​name is
“​articles​”
db.articles.insert({name : “mongoDB intro”, category :“database”,
tags : [“nosql”,”db”,”bigdata”]});
// querying a collection
db.articles.find().pretty();
// creating a ​document ​and saving to collection
var ​articleInfo ​={};
articleInfo​.articleName= “MongoDB Introduction”;
articleInfo​.authorName =”Sunil G”;
articleInfo​.tags = [“database”,“NoSQL”,”DBA”,“DEV”];
// saving a document to collection
db.​articles​.save(​articleInfo​);
P.S: in the above example,
Database Name: ​myblogs
Collection Name:​articles
Document Name: ​articleInfo