OCP 11g考试题库详解：1Z0-051-103题
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103. Examine the structure of the TRANSACTIONS table:
name Null Type
TRANS_ID NOT NULL NUMBER(3)
CUST_NAME VARCHAR2(30)
TRANS_DATE DATE
TRANS_AMT NUMBER(10,2)
You want to display the transaction date and specify whether it is a weekday or weekend.
Evaluate the following two queries:
SQL>SELECT TRANS_DATE,CASE
WHEN TRIM(TO_CHAR(trans_date,'DAY')) IN ('SATURDAY','SUNDAY') THEN 'weekend'
ELSE 'weekday'
END "Day Type"
FROM transactions;
SQL>SELECT TRANS_DATE, CASE
WHEN TO_CHAR(trans_date,'DAY') BETWEEN 'MONDAY' AND 'FRIDAY' THEN 'weekday'
ELSE 'weekend'
END "Day Type"FROM transactions;
Which statement is true regarding the above queries?
A. Both give wrong results.
B. Both give the correct result.
C. Only the first query gives the correct result.
D. Only the second query gives the correct result.
Answer: C
