本文是自己学习所做笔记.欢迎转载.但请注明出处:http://blog.csdn.net/jesson20121020 所谓的指针表达式是指一个表达式.其结果是一个指针. 例1. int a,b; int array[20]; int *p; p = &a; //&a 就是一个指针表达式,由于&a的结果就是一个指针. int **q = &p; //&p也是一个指针表达式. *q = &b; //*p和…
2. View the Exhibit to examine the description for the SALES table. Which views can have all DML operations performed on it? (Choose all that apply.) A. CREATE VIEW v3 AS SELECT * FROM SALES WHERE cust_id = 2034 WITH CHECK OPTION; B. CREATE VIEW v1…
5. Which SQL statements would display the value 1890.55 as $1,890.55? (Choose three .) A. SELECT TO_CHAR(1890.55,'$0G000D00') FROM DUAL; B. SELECT TO_CHAR(1890.55,'$9,999V99') FROM DUAL; C. SELECT TO_CHAR(1890.55,'$99,999D99') FROM DUAL; D. SELECT T…