大家好，我是考100分的小小码 ，祝大家学习进步，加薪顺利呀。今天说一说【2019年8月版】OCP 071认证考试原题-第39题「建议收藏」,希望您对编程的造诣更进一步.
Choose two
Exanine the desatption of the BOOKS_TRANSACTIONS table
Name Null? Type
———————————————————————————————-
TRANSACTION_ID NOT NULL VARCHAR2(6)
TRANSACTION_TYPE VARCHAR2(3)
BORROWED_DATE DATE
BOOK_ID ARCHAR2(6)
MEMBER_ID VARCHAR2(6)
Examine this partial SQL statement:
SELECT * FROM books_transctions;
Which two WHERE condtions give the same resut?
A) WHERE borrowed_date = SYSDATE AND (transaction_type= “RM” OR member_id IN
(“A101″,”A102” ) );
B) WHERE borrowed_date = SYSDATE AND transaction_type= “RM” OR member_id IN
(“A101″,”A102” ) ;
C) WHERE borrowed_date = SYSDATE AND (transaction_type= “RM” AND member_id=”A101″ OR
member_id = “A102”) );
D) WHERE (borrowed_date = SYSDATE AND transaction_type= “RM” ) OR member_id IN
(“A101″,”A102” );
E) WHERE borrowed_date = SYSDATE AND (transaction_type= “RM” AND ( member_id= “A101” OR
member_id = “A102” ) );
Answer：：BD
(解析：考的是 and 和 or 的优先级。)
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