多项选择题
Examine the following statement that is used to modify the constraint on the SALES table： SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE；
Which three statements are true regarding the above command（）
A.The constraint remains valid.
B.The index on the constraint is dropped.
C.It allows the loading of data into the table using SQL*Loader.
D.New data conforms to the constraint， but existing data is not checked
E.It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.
相关考题
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单项选择题
View the Exhibit and examine the privileges granted to the SL_REP user. The EMP table is owned by the SCOTT user. The SL_REP user executes the following command: SQL> GRANT SELECT ON scott.emp TO hr; Which statement describes the outcome of the command（）
A.The command executes successfully.
B.The command produces an error because the EMP table is owned by SCOTT.
C.The command produces an error because SL_REP has the GRANT ANY OBJECT PRIVILEGE withoutADMIN_OPTION.
D.The command produces an error because SL_REP does not have the SELECT privilege withGRANT_OPTION on the EMP table. -
单项选择题
Observe the information in the columns： 1： The SGA a. Text and parsed forms of all SQL statements 2： The cursor state b. Run-time memory values for the SQL statement， such as rows retrieved 3： User-session data c. Security and resource usage information 4：The stack space d. Local variables for the process Which option has the correct match between the memory areas and their contents（）
A.1-c，2-b，3-d，4-a
B.1-c，2-b，3-c，4-a
C.1-a，2-b，3-c，4-d
D.1-a，2-b，3-d，4-c -
单项选择题
You have issued a SHUTDOWN ABORT command to bring down your database instance. Considerthe steps that will be performed later when you open the database： 1：SGA is allocated. 2：Control file is read. 3：Redo log files are read. 4：Instance recovery is started. 5：Background processes are started. 6：Data files are checked for consistency. 7：Server parameter file or the initialization parameter file is read. Which option has the correct order in which these steps occur（）
A.7，1，5，2，3，6，4
B.1，2，3，7，5，6，4
C.7，1，4，5，2，3，6
D.1，7，5，4，2，3，6
