Which three are true regarding the use of outer joins?（） You cannot use IN operator in a condition that involves an outerjoin.。 You use (+) on both sides of the WHERE condition to perform an outerjoin.。 You use (*) on both sides of the WHERE condition to perform an outerjoin.。 You use an outerjoin to see only the rows that do not meet the join condition.。 In the WHERE condition, you use (+) following the name of the column in the table without matching rows, to perform an outerjoin.。 You cannot link a condition that is involved in an outerjoin to another condition by using the OR operator.。
加强安全生产管理的具体措施不包括（） 完善安全生产管理人员培训制度。 明确安全责任主体。 加强现场安全管理。 完善安全技术措施。
Which three descriptions are correct about the effects of the TRUNCATE command on a table（） The corresponding indexes for the table are also truncated.。 Delete triggers on the table are fired during the execution of the TRUNCATE command.。 The child table is truncated when the TRUNCATE command is applied on the parent table.。 The high-water mark （HWM） is set to point to the first usable data block in the table segment.。 No undo or very little undo data is generated during the execution of the TRUNCATE command。
The ORDERS table belongs to the user OE. OE has granted the SELECT privilege on the ORDERS table to the user HR.Which statement would create a synonym ORD so that HR can execute the following query successfully?（） CREATE SYNONYM ord FOR orders; This command is issued by OE 。 CREATE PUBLIC SYNONYM ord FOR orders; This command is issued by OE 。 CREATE SYNONYM ord FOR oe.orders; This command is issued by the database administrator 。 CREATE PUBLIC SYNONYM ord FOR oe.orders; This command is issued by the database administrator&e。
雷电引起的过电压称为（）。 内部过电压。 工频过电压。 大气过电压。
Which ONE of the following statements about Domino Enterprise server is true？（）
