As a result of mapping the ZYX Company ERD into a relational schema, primary key of the relation CUSTOMER will be referred to by a foreign key in the relation CUSTOMER.
Indicate whether the statement is true or false
Question 2
Creating ETL infrastructure includes creating necessary procedures and code for:
A) Designing and creating applications for indirect use by the end users
B) The seamless load of the transformed data into the operational data bases
C) Automatic extraction of relevant data from the data warehouses
D) Transformation of the extracted data, so that its quality is assured and its structure conforms to the structure of the modeled and implemented data warehouse
An example showing a modification that has occurred as a result of biological evolution
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