You work as a database administrator for Certkiller .com. You added atablespaceto your database. Because of the changes to the physical structure of your database， you performed a backup of the control file to trace. After this， you lost only the control files and the instance aborted due to a hardware failure. How would you proceed to recover the database？（） Start the instance and open the database, instance recovery automatically recovers control files 。 Create a file based on the contents of the trace file and save it to the control file locations and start the database 。 Re-create the database (The recovery of the control file is not possible because you have lost all the control files.) 。 Start the instance, in the NOMOUNTstate,re-create the control file using the CREATE CONTROLFILE command stored in the trace file. 。 Start the instance and MOUNT the database, then re-create the control file using the CREATE CONTROLFILE command stored in the trace file.。
社会保险费有养老保险费和（）等 失业保险费。 医疗保险费。 生育保险费。 工伤保险费。
与鲁迅的《狂人日记》有相似之处的小说是（） 马原的《虚构》。 余华的《现实一种》。 林白的《回廊之椅》。 残雪的《山上的小屋》。
简要叙述市场法评估资产的基本程序。
Manually， you set the consumer group of all of the newly created users to MYDB_GRP. You want the users to be able to change their consumer groups as per the application requirement. What was the first step that was needed in the process to achieve this objective？（） The user must have been granted the DBA role.。 The user must have been granted the switch privilege as a part of a role.。 The user must have been granted the Resource Manager administrator privilege.。 The user must have been granted the switch privilege by using the DBMS_RESOURCE_MANAGER_PRIVS package.。
As an alternative to setting the Visible property to No for the ORDERS_WINDOW, which built-in could you use to achieve the same result? （）
