Friday, 30 November 2012

ETL Testing – Basics

ETL Testing – Basics


ETL basically stands for Extract Transform Load – which simply implies the process where you extract data from Source Tables, transform them in to the desired format based on certain rules and finally load them onto Target tables. There are numerous tools that help you with ETL process – Informatica, Control-M being a few notable ones.

In ETL Testing, the following are validated:

  • Data File loads from Source System on to Source Tables
  • Transform Process that is designed to extract data from Source tables and move them to Staging tables
  • Data Validation of all Mapping Rules/Transformation Rules within the Staging tables
  • Data Validation within Target tables to ensure data is present in required format and there is no data loss from Source to Target tables

So ETL Testing implies – Testing this entire process using a tool or at table level with the help of test cases and Rules Mapping document.

Typically, data that is loaded into a data warehouse is derived from diverse sources of operational data, which may consist of data from databases, feeds, application files or flat files. The data must be extracted from these diverse sources, transformed to a common format, and loaded into the data warehouse. Typically, it is further aggregated into a data mart for efficient reporting. The ETL (Extract, transform and load) process is a critical step in any data warehouse implementation, and continues to be an area of major significance whenever the ETL code is updated.

An effective data warehouse testing strategy focuses on the main structures within the data warehouse architecture:

1. The ETL layer

2. The data warehouse itself

3. Associated data marts

4. The front-end business intelligence/reporting applications

ETL Testing is categorized into four different engagements:

  • New Data Warehouse Testing- a new data warehouse is built from ground up, gathering inputs from customer, extracting different data sources.  This is verified with the help of ETL tools
  • Migration Testing – In this type of engagement, migrating from the current ETL tool to a better option to improve efficiency
  • Change Request – In this type of project new data is added from different sources to an existing DW. Also, there might be a condition where customer needs to change their existing business rule or they might integrate the new rule.
  • Report Testing- Validating report layout, data in the report and calculation

 

ETL Testing Challenges

Some of the ETL Testing Challenges include:

  • Environment Instability
  •  Response time from the query executed, the failure of the jobs, the data set up required for the FIT testing, volume testing
  • Data selection from multiple source systems and analysis that follows pose great challenge
  • Volume and the complexity of the data
  • Inconsistent and redundant data in a data warehouse
  • Inconsistent and Inaccurate reports
  • Non-availability of History data

46 comments:

  1. QuickBooks Payroll has emerged one of the better accounting software that has had changed this is of payroll. Quickbooks Payroll Support contact number will be the team that provide you Quickbooks Payroll Support. This software of QuickBooks Payroll Support Phone Number

    ReplyDelete
  2. QuickBooks Enterprise Technical Support Number We have trained staff to soft your issue. Sometimes errors may possibly also happen because of some small mistakes. Those are decimals, comma, backspace, etc. Are you go through to cope with this? Unless you, we have been here that will help you.

    ReplyDelete
  3. Take delight in with an array of outshined customer service services for QuickBooks via QuickBooks Tech Support Phone Number whenever you want and from anywhere. It signifies you could access our tech support for QuickBooks at any time.

    ReplyDelete
  4. Account management, tax calculation, and deduction are not at all interesting things to do in the field. It might even be the most time consuming and confusing. In the event that you own any business and wants to grow its graph, you'll want to address these tasks. AccountWizy supplies the best QuickBooks Payroll Support USA to your clients and solves your queries at Intuit payroll support number.

    ReplyDelete
  5. You will find so many fields it covers like creating invoices, managing taxes, managing payroll etc. However exceptions are typical over, sometimes it creates the negative aspects and user wants QuickBooks Support Phone Number client Service help.

    ReplyDelete
  6. If you’re interested in small-business accounting solutions, the first thing experts and happy costumers will recommend you is QuickBooks by Intuit Inc. Intuit’s products for construction contractors range from the Quickbooks Pro, Simple Start Plus Pack, Quickbooks Premier Contractor, and Quickbooks Enterprise Solutions: QuickBooks Tech Support Phone Number.

    ReplyDelete
  7. Let’s talk about our QuickBooks Enterprise Technical Support that'll be quite exciting for you all. The advanced QuickBooks Desktop App for QuickBooks Support is now able to work as an ERP system beneficial for medium scale businesses. QuickBooks Desktop Enterprise just isn't alike to pro, premier & online versions. Capacity and capability could possibly be the reason behind this.

    ReplyDelete
  8. QuickBooks Technical Support Number Premier really is easy to work well with but errors may usually pop up at the time of installation, at the time of taking backup, while upgrading your software to your latest version etc.

    ReplyDelete
  9. Though QuickBooks Payroll Help Phone Number USA a helpful tool for QuickBooks users in the business realm, yet some hits and misses may arise anytime during use. All of these issues become a good inconvenience to users causing a group back again to the highly reputed nature of QuickBooks accounting software.

    ReplyDelete
  10. All the clients are extremely satisfied with us. We've got many businessmen who burn off our QuickBooks Support Phone Number service. You can easily come and find the ideal service to your requirements.

    ReplyDelete
  11. it’s commonplace to manage any errors on your own QuickBooks Customer Support Phone Number if you're doing not stick to the syntax, if the code is not put in properly or if you’re having any corruption inside the information of one's QuickBooks.

    ReplyDelete
  12. Our QuickBooks support number is obviously free and active to supply you the best QuickBooks customer care for its great products. So always get-in-touch with our QuickBooks Tech Support Number service team for easy and quick help and obtain more knowledge or details about the QuickBooks.

    ReplyDelete
  13. Support For QuickBooks Services provide approaches to your entire QuickBooks problem and also assists in identifying the errors with QuickBooks data files and diagnose them thoroughly before resolving these issues.

    ReplyDelete
  14. Our support also extends to those errors when QB Premier is infected by a virus or a spyware. We also handle almost any technical & functional issue faced during installation of drivers for QuickBooks Technical Support Number We also troubleshoot any type of error which can be encountered in this version or this version in a multi-user mode.

    ReplyDelete
  15. It is possible to dial the QuickBooks Technical Support Phone Number to possess a spoken language because of the QuickBooks Specialists or else you can even talk to them by victimization the chat choice on our internet site.

    ReplyDelete
  16. In the event that this product is acting oddly on the framework, at that time you ought to call a standout between the best QuickBooks Tech Support Number services in USA.

    ReplyDelete
  17. The QuickBooks Technical Support Phone Number team at site name is held responsible for removing the errors that pop up in this desirable software. We look after not letting any issue can be purchased in in the middle of your work and trouble you in undergoing your tasks.

    ReplyDelete
  18. Here we will update you how you'll be able to obtain QuickBooks Enterprise Number USA or simple recommendations for connecting QuickBooks enterprise customer support contact number. QuickBooks is financial software that will help small company, large business along with home users.

    ReplyDelete
  19. You need to decide the QuickBooks Tech Support Number the terribly second you will get a slip-up on your screen. it is potential that you just may lose information, or get corruption in your record or company file if the error prolongs.

    ReplyDelete
  20. Have you been scratching the head and stuck along with your QuickBooks related issues, you will be just one single click definately not our QuickBooks Technical Support Number team for your QuickBooks related issues. We site name, are leading tech support team provider for your entire QuickBooks related issues. Either it is day or night, we offer hassle-free tech support team for QuickBooks and its particular associated software in minimum possible time. Our dedicated technical team is available to be able to 24X7, 365 days a year to make sure comprehensive support and services at any hour. We assure you the quickest solution of most your QuickBooks software related issues.

    ReplyDelete
  21. A support option is always helpful in running a successful business. Our payroll support team is definitely ready to enable you to get back if you are in trouble dial our toll-free QuickBooks Payroll Support Phone Number .

    ReplyDelete
  22. But, i am at your side. In the event that you hire our service, you may be receiving the greatest solution. We are going to assure you as a result of error-free service. QuickBooks Tech Support Phone Number is internationally recognized. You must come to used to comprehend this help.

    ReplyDelete
  23. In addition QuickBooks Tech Support Number enables you to have a crystal-clear insight of the business which will help anyone to monitor your hard earned money, taxes as well as sales report, everything at one place.

    ReplyDelete
  24. QuickBooks Helpline Phone Number +1855-236-7529. QuickBooks is a world-class Accounting and Financial Management software capable of smoothening the entire accounting process by automating the tasks. Bookkeepers and Accountants from all over the world blindly trust the software because of its high accuracy and reliability. Or contact at QuickBooks Web Connector Error
    Read more: https://tinyurl.com/y5k882kz

    ReplyDelete
  25. I would like to mention that your blog is a unique piece of information. Although written simply, yet it comprises of all the important information. Hope to get more from your side. Sometimes, while working on QuickBooks, users can get interrupted by the QuickBooks Error 6000 83. No worries as this error can be resolved through the support of executives at QuickBooks Support Phone Number 1-833-441-8848.

    ReplyDelete
  26. It’s really difficult to find such a quality blog on the internet today. Your blog reflects your in-depth knowledge of the topic. If you need accounting software, I would recommend you to try QuickBooks accounting solutions. It is cheap and powerful software with 24X7 support available on QuickBooks Support Phone Number +1-888-238-7409. Visit us:- https://www.enetquickbookenterprise.com/quickbooks-support/

    ReplyDelete
  27. Very well-structured and crafted writeup! Indeed, one of the best blogs I have ever been through. I just loved your content. Write more frequently and consistently. So, if you ever come across the QuickBooks Error 80070057, get it resolved through the assistance of QuickBooks experts via rapid concern calls. So, go for advanced QuickBooks assistance at QuickBooks Support Phone Number 1 833-441-8848.

    ReplyDelete
  28. There is something different about your blog. All the facts and information seem so realistic. It is rare to find such a well-crafted post. However, if you ever come across technical doubts such as the QuickBooks Error -6150, -1006, report it and acquire the assistance of highly qualified experts at QuickBooks Support Phone Number 1-833-441-8848.

    ReplyDelete
  29. QuickBooks provides exclusive features that help you in managing your employee’s amenities efficiently. But sometimes you may face some unwanted errors in this software. In such a situation, dial our QuickBooks Support Phone Number +1 800-417-3165 and get suitable measures to rectify QuickBooks errors. Visit us- https://www.qbcustomersupportphonenumber.com/

    ReplyDelete
  30. Are you facing errors while working on QuickBooks software? if yes then we are here to help you. Contact us via our QuickBooks Support Phone Number +1 800-417-3165 and get instant support for QuickBooks errors. The team, on the other hand, has a keen interest in fixing your QuickBooks errors. Visit us- http://qbcustomersupportnumber.mystrikingly.com/

    ReplyDelete
  31. Looking for concrete solutions to fix QuickBooks Payroll errors? If yes, then your search ends here. Contact us via our QuickBooks Payroll Support Phone Number 18004173165 and get feasible solutions for your QuickBooks Payroll errors. No matter how complicated your issue would be, our executives are all-ready to deliver you best solutions. Visit us- https://www.qbcustomersupportphonenumber.com/quickbooks-payroll/

    ReplyDelete
  32. QuickBooks Enterprise is an accounting software that satisfies the demand for having a strategic ERP system in accounting and financial modules. But sometimes this software is often accompanied by some errors. In such a situation, dial our QuickBooks Enterprise Support Phone Number 18004173165 and get feasible solutions for errors. Visit us- https://www.qbcustomersupportphonenumber.com/quickbooks-enterprise/

    ReplyDelete
  33. Hello, thank you very much for writing such an informational blog. QuickBooks Desktop Enterprise is the best accounting software for professional accountants and large-scale business. It has support for upto thirty different multi-users and permission from the same software. To get affordable support, call on Quickbooks Enterprise Support Phone Number +1-833-422-8848.

    Read More: Quickbooks Support Phone Number

    ReplyDelete
  34. Amazing Post Man, too good!
    While going through your wonderful Post, I was able to connect it well with my problem. You have explained the concept in layman language that is well understood and the facts you have presented are very authentic. I personally admire your writing style. To manage your time more efficiently in your business, QuickBooks accounting software is the most prominent solution. While working on the application, you face some errors; one such is QuickBooks Error H505. Thus, to fix QuickBooks Error H505 you can contact QuickBooks Helpline Number +1 833-228-2822 and avail prominent solutions from our QuickBooks Experts.

    ReplyDelete
  35. Through the payroll software, one can easily manage their payday accounting process at an affordable price. It has the facility of infinite payroll with a direct deposit of 24hrs to the bank account. To get solutions, call us on QuickBooks Payroll Support phone number +18004173165. Visit us- https://www.theqbsupportphonenumber.com/quickbooks-payroll/

    ReplyDelete
  36. Your post is quite impressive. Thanks for sharing! The post is awesome where we can sink our teeth into and go to work. I love the way you have presented your post. QuickBooks is a great accounting software that assists the users to manage all their financial tasks of their business smoothly. You can contact QuickBooks Support Phone Number 1-844-235-3996 and talk to our experts and avail assistance in downloading, installing or updating this phenomenal accounting software.

    ReplyDelete
  37. Thumbs up for your blog. I hope you’re working with the QuickBooks accounting software is fine and upto the mark. If you face any error while using the software, call us on our tollfree QuickBooks Error Support Phone Number +1 (888) 238-7409. Our error support number has certified ProAdvisor, available for you 24X7. Visit us: - https://www.error.enetquickbookenterprise.com/

    ReplyDelete
  38. QuickBooks accounting software helps you in making your business accounting process easy and interactive. It has a dedicated dashboard feature from where you can easily get feedback for your business accounts. To get cost and time effective support, call on QuickBooks Support Phone Number +1-800-329-0391. Visit us- https://www.coldesk.com

    ReplyDelete
  39. QuickBooks payroll feature can easily be clubbed with your basic accounting software for managing your payday process. Through the software, one can easily file forms and taxes with all the legal rules and regulation. To get support for the payroll, call us on QuickBooks Payroll Support Phone Number +1 800-417-3165. Visit us- https://www.theqbsupportphonenumber.com/quickbooks-payroll/

    ReplyDelete
  40. QuickBooks users might face technical issues but they can resolve them shortly, with the help of brilliant executives. They can report all queries and problems to customer care executives. The squad would provide meaningful solutions to its users at QuickBooks Support Phone Number +1-844-232-O2O2.read more:-https://tinyurl.com/y42ywocq
    & visi us:-https://jamessmithsu.wixsite.com/quickbookssupport

    ReplyDelete
  41. Open Task Manager by clicking Ctrl-Alt-Del at the same time. This will let you see the list of programs currently running.
    Go to the Processes tab and stop the programs one by one by highlighting each program and clicking the End Process buttom.
    You will need to observe if the error message will reoccur each time you stop a process. If you would like to learn How To Troubleshoot QuickBooks Error 9999, you can continue reading this blog.

    ReplyDelete
  42. Very helpful and i would like to thanks!
    Know More About How to do Direct deposit in Quickbooks?if you are facing Direct deposit issues, Get live support 24*7 from QuickBooks expert on tool-free Number.
    Click here to know how to do Direct deposit in Quickbooks
    Dial for any tech support: 1-844-908-0801

    ReplyDelete