Frage im Vorstellungsgespräch bei PNC Financial Services Group
Asked about SQL and ETL process
Antwort im Vorstellungsgespräch
Anonym
6. Sept. 2015
SQL is a structured language developed initially at IBM for managing and extracting data from relational databases. ETL is extract,transformation, and load. ETL is a process of moving data from a data source and applying needed transformations, and then applying the answer to the target source with the applied transformations.