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Prashanth Jayaram
DB Technologist, Author, Blogger, Service Delivery Manager at CTS, Automation Expert, Technet WIKI Ninja, MVB and Powershell Geek My Profile: https://social.technet.microsoft.com/profile/prashanth jayaram/ http://www.sqlshack.com/author/prashanth/ http://codingsight.com/author/prashanthjayaram/ https://www.red-gate.com/simple-talk/author/prashanthjayaram/ http://www.sqlservercentral.com/blogs/powersql-by-prashanth-jayaram/ Connect Me: Twitter @prashantjayaram GMAIL powershellsql@gmail.com The articles are published in: http://www.ssas-info.com/analysis-services-articles/ http://db-pub.com/ http://www.sswug.org/sswugresearch/community/
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Category Archives: MongoDB
SQL vs NoSQL
Introduction Despite the traditional relational DB world, there’s also a trend for NoSQL. The NoSQL databases that enable storing unstructured and heterogeneous data. The scalability features have risen it’s popularity to a greater extent in the current market. Horizontal scaling … Continue reading
Why MongoDB?
MongoDB is Object-Oriented, simple, dynamic and scalable NoSQL database. It is based on the NoSQL document store model, in which data objects are stored as separate documents inside a collection instead of storing the data into columns and rows of … Continue reading
Securing MongoDB – User Administration
The db.createUser(user, writeConcern) method used to create users.We need to provide the username, password and roles The definition of createUser as follows { user: “<name>”, pwd: “password>”, customData: { <User Tag> }, roles: [ { role: “<role>”, db: “<database>” }, { … Continue reading
Posted in MongoDB
Tagged createUser, PasswordChange, RevokeRoles in MongoDB, Roles examples, Security In MongoDB
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MongoDB : Point in Time Restore/Recovery of MongoDB
This post demonstrates the methods of PIT recovery of the database. The step by step details of the recovery process is explained below The requirement for PIT restore/recovery is to setup a single node replica so that the oplogs can … Continue reading
MongoDB : How to get Top, Bottom,Middle and Range of records
In MongoDB,the limit() method is used to limit the result set to be returned. You can also use this with various methods such as sort() and skip() for various combination of requirement. The MS SQL equivalent is TOP function >SELECT TOP 10 * … Continue reading
MongoDB – Insert,Update,Upsert and Delete Examples – CRUD
In MongoDB we have to use either insert() or save() method to add the document to a collection Insert Single document > db.employee.insert( { “employee_id”:1101, “name”:”Prashanth”, “sal”:90000, “dob”: new Date(1983,2,3,5,20), “department”: [ ‘DB Amdin’,’DB Developer’ ], “Location”:”New York” }); Insert Multiple document – We have to use … Continue reading
Posted in MongoDB, Uncategorized
Tagged insert, insert multiple document, remove, update, update all records, update with criteris, upserts
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MongoDB – How to Copy Database
Using copydb Run the copydb under admin database with from,to, host parameters >use admin switched to db admin > db.runCommand({ copydb: 1, fromdb: “test”, todb: “new_test”, fromhost: “localhost” }) Using copyDatabase method The db.copyDatabase() method is used to copy a … Continue reading
MongoDB -Get Total datasize of all DB’s
var sum = 0; db.getMongo().getDBs()[“databases”].forEach(function(x) { sum += db.getMongo().getDB(x.name).stats().dataSize }); print(sum ); OR db = db.getSiblingDB(“admin”); dbs = db.runCommand({ “listDatabases”: 1 }).databases; var sum1=0;dbs.forEach(function(database) { sum1+=db.getMongo().getDB(database.name).stats().dataSize }); print(sum1);
MongoDB – Drop database
The dropDatabase command drops the current database, deleting the associated data files. Different methods to drop database Method 1: 1. select the database which you want to delete >use < database name > 2. Then issue the below command >db.dropDatabase() … Continue reading