OCP认证是Oracle非常重要的一个认证,对于11g版本来说,考试科目为071、052、053,对于12c版本来说,考试科目为071、062、063,可见071是个很重要的考试,这里我们收集了近期071考试的原题,分享给大家。
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071考题整理-第25题、choose two:
View the Exhibit and examine the data in the PRODUCT_INFORMATION table.
Which two tasks would require subqueries? (Choose two.)
A) displaying all supplier IDs whose average list price is more than 500
B) displaying the total number of products supplied by supplier 102071 and having product status OBSOLETE
C) displaying all the products whose minimum list prices are more than the average list price of products having the product status orderable
D) displaying the number of products whose list prices are more than the average list price
E) displaying the minimum list price for each product status
Answer:CD
(解析:子查询用在查询未知的值。
C 的答案类似于:
SQL> select sal from emp where sal > (select avg(sal) from emp where job='SALESMAN');
D 的答案类似于:
SQL> select count(*) from emp where sal > (select avg(sal) from emp);
)
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