Câu 1: C2090-632: IBM Cognos 10 BI Metadata Model Developer

In Framework Manager, why is it recommended that modelers alter the default all-inclusive select statements of data source query subjects as little as possible?

1. A. To generate the most efficient SQL at run time and simplify model maintenance. — đáp án hiện tại
2. B. To prevent the exclusion of columns from a table that may be required in future reports.
3. C. To prevent improperly constructed SQL and reduce issues with model documentation and readability.
4. D. To provide authors with access to all columns in a database table which reduces requests to the modeler.