存储器中，在其内部利用基本单元电路存放各个字的同一位，从使用的角度考虑，这种结构称为（)A．子

A. It releases the storage space used by the table.

B. It does not release the storage space used by the table.

C. You can roll back the deletion of rows after the statement executes.

D. You can NOT roll back the deletion of rows after the statement executes.

E. An attempt to use DESCRIBE on the DEPT table after the TRUNCATE statement executes will display an error.

F. You must be the owner of the table or have DELETE ANY TABLE system privileges to truncate the DEPT table

A. It releases the storage space used by the table.

B. It does not release the storage space used by the table.

C. You can roll back the deletion of rows after the statement executes.

D. You can NOT roll back the deletion of rows after the statement executes.

E. An attempt to use DESCRIBE on the DEPT table after the TRUNCATE statement executes will display an error.

F. You must be the owner of the table or have DELETE ANY TABLE system privileges to truncate the DEPT table

A. The DESCRIBE DEPT statement displays the structure of the DEPT table.

B. The ROLLBACK statement frees the storage space occupies by the DEPT table.

C. The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist.

D. The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

A.The DESCRIBE DEPT statement displays the structure of the DEPT table.

B.The ROLLBACK statement frees the storage space occupied by the DEPT table.

C.The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist.

D.The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

A. The DESCRIBE DEPT statement displays the structure of the DEPT table.

B. The ROLLBACK statement frees the storage space occupies by the DEPT table.

C. The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist.

D. The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

A. DROP TABLE dept;

B. DELETE TABLE dept;

C. TRUNCATE TABLE dept;

D. DELETE * . * FROM dept; [END CODE]"

A．

B．

C．

D．

e with the same name exists in the schema.You query RECYCLEBIN and find multiple entries for the SALES_EMP table as follows, You then issue the following statement to recover the table:SQL> FLASHBACK TABLE sales_emp TO BEFORE DROP;What would be the outcome of the precedent statement？（）

A. It retrieves the latest version of the table from the recycle bin

B. It retrieves the oldest version of the table from the recycle bin

C. It retrieves the version of the table for which undo information is available

D. It returns an error because the table name is not specified as per the names in the OBJECT_NAME column

A. The DESCRIBE DEPT statement displays the structure of the DEPT table.

B. The ROLLBACK statement frees the storage space occupies by the DEPT table.

C. The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist.

D. The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

Scott issues the SQL statements:CREATE TABLE dept(deptno NUMBER(2),dname VARCHAR2(14),loc VARCHAR2(13)};GRANT SELECTON DEPTT0 SUE;If Sue needs to select from Scott‘s DEPT table, which command should she use？（）

A.SELECT*FROMDEPT；

B.SELECT*FROMSCOTT.DEPT；

C.SELECT*FROMDBASCOTTDEPT；

D.SELECT*FROMALL_USERSWHEREUSER_NAME=‘；SCOTT‘；ANDTABLENAME=‘；DEPT‘；；