Which two operations can be flashed back using the Flashback technology？（） DROP USER SMITH；。 DROP TABLE EMPLOYEES；。 DROP TABLESPACE USERS；。 ALTER TABLE SALES_REP DROP PARTITION P1；。 ALTER TABLE EMPLOYEES DROP COLUMN DESIG_ID；。
标准通用标注语言是（） HTML。 SGML。 HTTP。 XML。
Small， medium， and large businesses today are increasingly using "Green" products within their IT Environments. What are the most significant factors propelling this change？（） Government regulation and environmental effects。 Cost of power consumption and environment effects。 Government regulation and cost of power consumption。 Environmental effects and low cost of product。
You find pockets of empty space in the USER_DATA tablespace due to a lot of DML operations on the objects in the USER_DATAtablespace. The pockets of empty spaces are too small to be reused individually. This is leading to wastage of space. You decide to perform the shrink operation to reclaim the wasted space. Which advisor will you use to determine the objects in the USER_DATA tablespace that are good candidates for the shrink operation？（） SQL Tuning Advisor。 SQL Access Advisor。 Undo Advisor。 Segment Advisor。
手用丝锥螺纹公差带为（）。 H4。 H5。 H6。 H7。
The enableModifiedFlag enables which of the following？（）
