Y ou execute this command: ALTER TABLE employees SET UNUSED (department_id); Which two are true? A. A query can display data from the DEPARTMENT_ID column. B. The storage space occupied by the DEPARTM ...

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Which two statements are true about the rules of precedence for operators? A. Arithmetic operators with equal precedence are evaluated from left to right within an expression. B. Multiple parentheses ...

Which two are true about the data dictionary? A. Base tables in the data dictionary have the prefix DBA_. B. All user actions are recorded in the data dictionary. C. The data dictionary is constantly ...

Which two are true about granting privilege on objects? A) An object privilege can be granted to a role only by the owner of that object B) An object privilege can be granted to other users only by th ...

Which three are true about privileges and roles? A. A role is owned by the user who created it. B. System privileges always set privileges for an entire database. C. All roles are owned by the SYS sch ...

Which three are true about multiple INSERT statements? A. They can be performed only by using a subquery. B. They can be performed on relational tables. C. They can be performed on views. D. They can ...

Which two statements are true regarding the UNION ALL operators? A. NULLS are not ignored during duplicate checking. B. Duplicates are eliminated automatically by the UNION ALL operator C. The names o ...