单项选择题
A. Compression can be enabled at the table， tablespace， or partition level for direct loads only.
B. Compression can be enabled only at the table level for both direct loads and conventional DML.
C. Compression can be enabled at the table， tablespace， or partition level for conventional DML only.
D. Compression can be enabled at the table， tablespace， or partition level for both direct loads and conventional DML.
多项选择题 Inwhichtwoaspectsdoeshotpatchingdifferfromconventionalpatching？（）
多项选择题 What are the prerequisites for performing flashback transactions? （）(Choose all that apply)
单项选择题 Examine the following PL/SQL block： SET SERVEROUTPUT ON SET LONG 10000 ECLARE report clob； BEGIN report ：= DBMS_SPM.EVOLVE_SQL_PLAN_BASELINE（）； DBMS_OUTPUT.PUT_LINE（report）； END； Which statement describes the effect of the execution of the above PL/SQL block？（）