Quality is delighting customers
Could anybody pls tell about ETL testing.Wat designation ppl will get who are working on ETL testing since it relates with DB.How the market now a days.Currently I m working on Automation testing I am planning to learn ETL testing so pls give suggestion.
Thanks in advance
ETL 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 - (Eg:Informatica, Control-M ,etc..) 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.
In ETL Testing, the following are prima facie validated -
1) Data File loads from Source system on to Source Tables.
2) The ETL Job that is designed to extract data from Source tables and then move them to staging tables. (Transform process)
3) Data validation within the Staging tables to check all Mapping Rules / Transformation Rules are followed.
4) Data Validation within Target tables to ensure data is present in required format and there is no data loss from Source to Target tables.