CompuCom Datastage Developer Interview Questions and Answers

ETL stands for Extract, Transform, Load. It is a process of extracting data from various sources, transforming it, and loading it into a target database or data warehouse.

• ETL is used to integrate data from multiple sources into a single, consistent format.

• The Extract phase involves retrieving data from source systems such as databases, files, or APIs.

• The Transform phase involves cleaning, filtering, and manipulating th...read more

Join inner outer functions are used in Datastage to combine data from multiple sources based on a common key.

• Join function is used to combine rows from two or more tables based on a common key.

• Inner join returns only the matching rows from both tables.

• Outer join returns all the rows from both tables, including unmatched rows.

• Examples: INNER JOIN, LEFT OUTER JOIN, RIGHT OUTER JOIN, FULL OUTER JOIN.