Azure cosmos DB

SQLServerCentral Article

Quick and Effective Migration Between CosmosDB Collections Using ADF

  • Article

This document aims to explain the process of using ADF (Azure data Factory) to make a copy of a Cosmos DB (Instance A)  collection into a new collection in another Cosmos DB Instance effectively and cost effectively. For example, here is our  Instance A in the Data Explorer: Here is Instance B: We are looking […]

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2024-03-25

1,045 reads

SQLServerCentral Article

Azure Cosmos DB – HTAP using Azure Synapse Link

  • Article

In this article, we will explore the HTAP capabilities of Cosmos DB. The goal is to derive real-time insights from transactional changes made to Cosmos DB, in a cost-effective manner with minimal overhead. I want the solution to be scalable, reliable and overall simple to maintain.

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2021-11-03

2,240 reads

SQLServerCentral Article

Analyze Azure Cosmos DB data using Synapse Link and Power BI

  • Article

Introduction In my last article, Using Azure Synapse Link for Azure Cosmos DB , I discussed creating the Synapse Link to query data present in Azure Cosmos DB from my Synapse workspace. Here, I will create a new database in the serverless SQL pool and create views based on the Cosmos DB JSON files. Then, I will […]

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2021-01-12

2,694 reads

Technical Article

Powershell Script - Azure cosmos DB(SQL API)

  • Script

Scripts contains 4 following functions. Users can create 3 different script from this for inserting, fetching and deleting a document.
1. Function Generate-MasterKeyAuthorizationSignature - This function is used to create connection to Azure cosmos DB. This function codes were taken from Technet.
2. Function Post-CosmosDb - Insert single document in azure cosmos DB. Same function can be used to perform bulkinsert. This function code was taken from following article. To make it useful i made some modification in it.
(https://www.systemcenterautomation.com/2018/06/cosmos-db-rest-api-powershell/)
3. Function Get-CosmosDocument - Fetch single document from azure cosmos DB. Same function can be used to fetch all documents from Cosmos DB.
4. Function Delete-CosmosDbDocument - Delete single document from cosmos DB. Same function can be used to delete more than one document with some additional codes.

To use any of the function like Post,Get, Delete. you have to comment the other 2 function call. If you are using all 3 functions(Post,Get, Delete), Be cautious while using them.

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2020-05-11 (first published: )

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Question of the Day

The Read Committed Snapshot Isolation behaviour

I am currently working with Sql Server 2022 and AdventureWorks database. First of all, let's set the "Read Committed Snapshot" to ON:

use master;
go

alter database AdventureWorks set read_committed_snapshot on with no_wait;
go
Then, from Session 1, I execute the following code:
--Session 1
use AdventureWorks;
go

create table ##t1 (id int, f1 varchar(10));
go

insert into ##t1 values (1, 'A');
From another session, called Session 2, I open a transaction and execute the following update:
--Session 2
use AdventureWorks;
go

begin tran;
update ##t1 
set f1 = 'B'
where id = 1;
Now, going back to Session 1, what happens if I execute this statement?
--Session 1
select f1
from ##t1
where id = 1;
 

See possible answers