30. Evaluate the following CREATE TABLE commands: CREATE TABLE orders (ord_no NUMBER(2) CONSTRAINT ord_pk PRIMARY KEY, ord_date DATE, cust_id NUMBER(4)); CREATE TABLE ord_items (ord_no NUMBER(2), item_no NUMBER(3), qty NUMBER(3) CHECK (qty BETWEEN 10…

不得不说,这也许会是一道长期在我的博客里作为“HARD”难度存在的题 这道题能很好的考验选手的思考能力,但本蒟蒻最后还是听了省队爷讲了之后才会...(默默面壁) 题目里,说对于每一个点,是用当前选出的M个里面,最长长度减去最短长度作为价值.也就是说:选择长度介于最长与最短之间的边,是对答案没有影响的.(本蒟蒻并没有想到这一点...) 所以由于这一点,我们可以先对于边的长度排序. 那么题目中提到的M,是“选中多余或等于M条边”,从这里就可以看出,我们只需要选定一个头和一个尾就好,由此可以看出,这个…

1Z0-053 争议题目解析 Summary 题目NO. 题目解析链接地址 题库答案 参考答案 考查知识点  24 http://www.cnblogs.com/jyzhao/p/5319220.html  BCE  BCD  SQL Test Case Builder  25 http://www.cnblogs.com/jyzhao/p/5265330.html  D  CDE  Additional Flashback Operations  46 http://www.cnblogs.c…

1Z0-053 争议题目解析46 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 46.What happens when you run the SQL Tuning Advisor with limited scope? A. Access path analysis is not performed for SQL statements. B. SQL structure analysis is not performed for SQL statements. C. S…

1Z0-053 争议题目解析330 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 330.What will be the end result of this set of RMAN commands? shutdown abort startup mount restore datafile 4 until time ,,09/30/2008:15:00:00; recover datafile 4 until time ,,09/29/2008:15:00:00; al…

1Z0-053 争议题目解析541 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 541.If you use ALTER DISKGROUP ... ADD DISK and specify a wildcard for the discovery string, what happens to disks that are already a part of the same or another disk group? A. The command fails unle…

1Z0-053 争议题目解析684 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 684.Your database is running in ARCHIVELOG mode. You have been taking backups of all the data files and control files regularly. You are informed that some important tables in the BILLING tablespace…

1Z0-053 争议题目解析25 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 25.You enabled Flashback Data Archive on the INVENTORY table. Which DDL operation is supported on the table after enabling Flashback Data Archive? A. Drop the table. B. Partition the table C. Truncate…

1Z0-053 争议题目解析24 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 24.Which of the following information will be gathered by the SQL Test Case Builder for the problems pertaining to SQL-related problems? (Choose all that apply.) A. ADR diagnostic files B. all the opt…

1Z0-053 争议题目解析86 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 86.Your production database is running in archivelog mode and you are using recovery manager (RMAN) with recovery catalog to perform the database backup at regular intervals. When you attempt to resta…