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047-207

原创 Linux操作系统 作者:jbymy2000 时间:2012-03-19 11:00:25 0 删除 编辑
207. You executed the following SQL statements in the given order:
CREATE TABLE orders
(order_id NUMBER(3) PRIMARY KEY,order_date DATE, customer_id number(3));
INSERT INTO orders VALUES (100,'10mar2007',222);
ALTER TABLE orders MODIFY order_date NOT NULL;
UPDATE orders SET customer_id=333;
DELETE FROM order;
The DELETE statement results in the following error:
ERROR at line 1:
ORA00942:table or view does not exist
What would be the outcome?
A. All the statements before the DELETE statement would be rolled back.
B. All the statements before the DELETE statement would be implicitly
committed within the session.
C. All the statements up to the ALTER TABLE statement would be committed and
the outcome of UPDATE statement would be rolled back.
D. All the statements up to the ALTER TABLE statement would be committed and
the outcome of the UPDATE statement is retained uncommitted within the
session.
Answer: D
Statements:声明
ALTER TABLE 属于DDL语句,会隐式提交.
Remember that an ALTER TABLE statement is a DDL statement, and that when
any DDL statement executes, it causes an implied commit event to occur.

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