变压器温升是指（）。 .一二次线圈温度之差。 线圈与上层油温之差。 上层油温与变压器周围温度之差。
The RECYCLEBIN parameter is set to ON for your database. You drop a table, PRODUCTS, from the SCOTT schema. Which two statements are true regarding the outcome of this action? （）(Choose two) All the related indexes and views are automatically dropped。 The flashback drop feature can recover only the table structure。 Only the related indexes are dropped whereas views are invalidated。 The flashback drop feature can recover both the table structure and its data。
You are performing an incomplete recovery because certain important tables were deleted and purged from the Recycle Bin. In which mode will you perform the recovery？（） MOUNT mode。 RESTRICTED mode。 OPEN mode。 NOMOUNT mode。
在囊式封堵作业中，若采用单封方式，封堵坑长度一般为（） 5m。 7m。 10m。 15m。
The SAVE_AMT column in the ACCOUNTS table contains the balance details of customers in a bank. As part of the year-end tax and interest calculation process， all the rows in the table need to be accessed. The bank authorities want to track access to the rows containing balance amounts exceeding $200，000， and then send an alert message to the administrator. Which method would you suggest to the bank for achieving this task？（） implementing value-based auditing by using triggers。 implementing fine-grained auditing with audit condition and event handler。 performing standard database auditing to audit object privileges by setting the AUDIT_TRAIL parameter to EXTENDED。 performing standard database auditing to audit SQL statements with granularity level set to ACCESS。
You issued the following command on the temporary tablespace LMTEMP in your database：
SQL>ALTER TABLESPACE lmtemp SHRINK SPACE KEEP 20M；
Which requirement must be fulfilled for this command to succeed？（）
