ocp认证题：11g-1Z0-051-v9.02-010题

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10. View the Exhibit; e xamine the structure of the PROMOTIONS table.

Each promotion has a duration of at least seven days .

Your manager has asked you to generate a report, which provides the weekly cost for each promotion

done to l date.

Which query would achieve the required result?

A. SELECT promo_name, promo_cost/promo_end_date-promo_begin_date/7

FROM promotions;

B. SELECT promo_name,(promo_cost/promo_end_date-promo_begin_date)/7

FROM promotions;

C. SELECT promo_name, promo_cost/(promo_end_date-promo_begin_date/7)

FROM promotions;

D. SELECT promo_name, promo_cost/((promo_end_date-promo_begin_date)/7)

FROM promotions;

Answer: D

试题解析：

提要要求:报表提供促销期间每周的成本

D,正确，符合题意。

ABC语法错误

sh@TEST0924> SELECT promo_name, promo_cost/promo_end_date-promo_begin_date/7 FROM promotions;

SELECT promo_name, promo_cost/promo_end_date-promo_begin_date/7 FROM promotions

ERROR at line 1:

ORA-00932: inconsistent datatypes: expected NUMBER got DATE

sh@TEST0924> SELECT promo_name,(promo_cost/promo_end_date-promo_begin_date)/7 FROM promotions;

SELECT promo_name,(promo_cost/promo_end_date-promo_begin_date)/7 FROM promotions

ERROR at line 1:

ORA-00932: inconsistent datatypes: expected NUMBER got DATE

sh@TEST0924> SELECT promo_name, promo_cost/(promo_end_date-promo_begin_date/7) FROM promotions;

SELECT promo_name, promo_cost/(promo_end_date-promo_begin_date/7) FROM promotions

ERROR at line 1:

ORA-00932: inconsistent datatypes: expected NUMBER got DATE