86. Examine the structure and data of the CUST_TRANS table:

CUST_TRANS 

Name       Null           Type

CUSTNO      NOT NULL       CHAR(2)

TRANSDATE                 DATE

TRANSAMT                  NUMBER(6,2)

CUSTNO TRANSDATE       TRANSAMT

11      01-JAN-07       1000

22      01-FEB-07       2000

33      01-MAR-07       3000

Dates are stored in the default date format dd-mon-rr in the CUST_TRANS table.

Which SQL statements would execute successfully? (Choose three .)

A. SELECT transdate + '10' FROM cust_trans; 

B. SELECT * FROM cust_trans WHERE transdate  =   '01-01-07'; 

C. SELECT transamt FROM cust_trans WHERE custno > '11'; 

D. SELECT * FROM cust_trans WHERE transdate='01-JANUARY-07'; 

E. SELECT custno + 'A' FROM cust_trans WHERE transamt > 2000; 

Answer: ACD

答案解析：

参考：http://blog.csdn.net/rlhua/article/details/12832019

A，日期隐式转换为字符型。正确

B,  '01-01-07'为特定格式，需要用to_date函数转换。

C，custno 为字符，字符与字符相比较，正确。

D, 01-JAN-07 等同于01-JANUARY-07，不需要转换函数，可隐式转换。正确。

E，错误，不能使用+。