24.Examine the structure proposed for the TRANSACTIONS table:
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24.Examine the structure proposed for the TRANSACTIONS table:
name Null Type
TRANS_ID NOT NULL NUMBER(6)
CUST_NAME NOT NULL VARCHAR2(20)
CUST_STATUS NOT NULL VARCHAR2
TRANS_DATE NOT NULL DATE
TRANS_VALIDITY INTERVAL DAY TO SECOND
CUST_CREDIT_VALUE NUMBER(10)
Which two statements are true regarding the storage of data in the above table structure? (Choose two.)
A.The TRANS_DATE column would allow storage of dates only in the dd-mon-yyyy format.
B.The CUST_CREDIT_VALUE column would allow storage of positive and negative integers.
C.The TRANS_VALIDITY column would allow storage of a time interval in days, hours, minutes, and seconds.
D.The CUST_STATUS column would allow storage of data up to the maximum VARCHAR2 size of 4,000 characters.
答案：BC
解析：
A:错误，TRANS_DATE可以存储其他格式，只要修改默认的类型nls_data_format就可以了
B:正确，可以存储正数和负数
C:正确，
D:错误，这里varchar2可以在sql中存储的是4000个bytes，而不是characters，
name Null Type
TRANS_ID NOT NULL NUMBER(6)
CUST_NAME NOT NULL VARCHAR2(20)
CUST_STATUS NOT NULL VARCHAR2
TRANS_DATE NOT NULL DATE
TRANS_VALIDITY INTERVAL DAY TO SECOND
CUST_CREDIT_VALUE NUMBER(10)
Which two statements are true regarding the storage of data in the above table structure? (Choose two.)
A.The TRANS_DATE column would allow storage of dates only in the dd-mon-yyyy format.
B.The CUST_CREDIT_VALUE column would allow storage of positive and negative integers.
C.The TRANS_VALIDITY column would allow storage of a time interval in days, hours, minutes, and seconds.
D.The CUST_STATUS column would allow storage of data up to the maximum VARCHAR2 size of 4,000 characters.
答案：BC
解析：
A:错误，TRANS_DATE可以存储其他格式，只要修改默认的类型nls_data_format就可以了
B:正确，可以存储正数和负数
C:正确，
D:错误，这里varchar2可以在sql中存储的是4000个bytes，而不是characters，
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- 24.Examine the structure proposed for the TRANSACTIONS table:
- 23.Examine the structure proposed for the TRANSACTIONS table:
- 102.Examine the structure of the TRANSACTIONS table:
- 103.Examine the structure of the TRANSACTIONS table:
- 90.Examine the structure and data in the PRICE_LIST table:
- 94.Examine the structure of the PROGRAMS table:
- 6.Examine the structure of the SHIPMENTS table:
- 18.Examine the structure of the PROMOTIONS table:
- 86.Examine the structure and data of the CUST_TRANS table:
- 96.Examine the structure of the INVOICE table.
- 104.Examine the structure of the PROMOS table:
- 105.Examine the structure of the PROMOS table:
- 109.Examine the structure of the MARKS table:
- 113.Examine the structure of the ORDERS table:
- 125.Examine the structure of the CUSTOMERS table:
- 140.Examine the structure of the PRODUCTS table:
- 8.View the Exhibit and examine the structure of the CUSTOMERS table.
- 10.View the Exhibit;examine the structure of the PROMOTIONS table.
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