172.The SQL statements executed in a user session are as follows:

172.The SQL statements executed in a user session are as follows:

SQL> CREATE TABLE product(pcode NUMBER(2),pname VARCHAR2(10));

SQL> INSERT INTO product VALUES (1, 'pen');

SQL> INSERT INTO product VALUES (2,'pencil');

SQL> SAVEPOINT a;

SQL> UPDATE product SET pcode = 10 WHERE pcode = 1;

SQL> SAVEPOINT b;

SQL> DELETE FROM product WHERE pcode = 2;

SQL> COMMIT;

SQL> DELETE FROM product WHERE pcode=10;

Which two statements describe the consequences of issuing the ROLLBACK TO SAVE POINT a

command in the session? (Choose two.)

A.The rollback generates an error.

B.No SQL statements are rolled back.

C.Only the DELETE statements are rolled back.

D.Only the second DELETE statement is rolled back.

E.Both the DELETE statements and the UPDATE statement are rolled back.

答案：AB

解析：

A:正确，commit已经提交了之前的事务，那么SAVEPOINT a是不存在的

B:正确

C:错误，这里如果只执行rollback的话，那么这里第二个delete是对的

D:错误

E：错误