ETL concepts interview questions

Category has interview querstions on basic etl concepts, including questions on basic task of extraction, transformation & loading. Do check back for latest additions.

Extract, transform and load (ETL) is a process in database usage and especially in data warehousing that involves:

• Extracting data from outside sources
• Transforming it to fit operational needs (which can include quality levels)
• Loading it into the end target (database or data warehouse)