Eight stages of the ETL testing process

How do I start learning ETL testing?

Eight stages of the ETL testing process

  1. Identify business requirements — Design the data model, define business flow, and assess reporting needs based on client expectations.
  2. Validate data sources — Perform a data count check and verify that the table and column data type meets specifications of the data model.

Is ETL testing easy to learn?

ETL testing is a notoriously difficult job. But it doesn’t have to be. ETL testers have exceptional data analysis, data quality and data manipulation expertise that can have a huge impact on enterprise data projects.

How do I start ETL?

The process is:

  1. Reference data — Create a set of reference data that defines permissible values your data may contain.
  2. Data extraction — Extract data from sources, converting it from multiple formats like RDBMS, XML, JSON, CSV, etc. to a single standardized format.

Which is the easiest ETL tool to learn?

It depends from user to user but some of the easiest ETL Tools that you can learn are Hevo, Dataddo, Talend, Apache Nifi because of their simple-to-understand UI and as they don’t require too much technical knowledge.

Who can learn ETL testing?

ETL Certification Overview Anybody can get trained in this one of the best ETL Architecture training courses as there are no prerequisites to learn this technology. Some basic knowledge of SQL concepts can be helpful.

What is ETL beginner?

ETL stands for Extract, Transform and Load. An ETL tool extracts the data from different RDBMS source systems, transforms the data like applying calculations, concatenate, etc. and then load the data to Data Warehouse system. The data is loaded in the DW system in the form of dimension and fact tables.

What are the skills required for ETL testing?

7 Skills Every ETL Developer Should Have

  • ETL Tools/Software. ETL Developers obviously need a tool to develop on.
  • SQL. SQL, or Structured Query Language, is the lifeblood of ETL as it is the most popular database language.
  • Parameterization.
  • Scripting Language.
  • Organization.
  • Creativity.
  • Debugging/Problem Solving.

Is ETL testing manual testing?

Tons of planning are involved and a tester should have an intimate knowledge of how this particular pipeline is designed and how to write complex test cases for it. This means that ETL testing is mostly done manually, though we will talk about automation tools further in the article.

What should I learn first to start ETL testing?

– Strong knowledge of SQL. Joins, Union, Data Constraint, SQL commands, DML and DDL. – Concepts of creating test case or scenarios from data mapping sheets. – Unix basics commands. – Basic knowledge of Data Warehouse concepts and Database. – Concepts of ETL process.

How to learn ETL testing?

ETL Testing Tutorial. An ETL tool extracts the data from all these heterogeneous data sources, transforms the data (like applying calculations, joining fields, keys, removing incorrect data fields, etc.), and loads it into a Data Warehouse. This is an introductory tutorial that explains all the fundamentals of ETL testing.

What are the challenges of ETL testing?

Data loss during ETL testing.

  • Duplicate data and Incompatibility.
  • Lack of inclusive test bed.
  • Testers have no benefits to execute ETL jobs by their own.
  • Data volume and complexity is huge.
  • Inefficient in procedures and business process.
  • Inconvenience securing and building test data.
  • Absence of business course information.

    • How to test an ETL process?

    The source data content and format do not confirm the requirement specifications.

  • Source systems accidently or knowingly changed the way data was sent.
  • Find Data issues early in the flow and project time line.
  • It will prevent ETL process from populating incorrect data downstream.
  • Some errors in data can break the processes in production.