QUESTION NO: 291
Which of these are valid Flashback Database recovery point parameters? (Choose all that apply.)
A. SCN
B. Timestamp
C. Named recovery point
D. Transaction ID
E. Session ID
Answ...
分类:
其他好文 时间:
2015-10-11 11:37:26
阅读次数:
155
http://blog.sina.com.cn/s/blog_616b428f010163bo.html事务(transaction)是数据库管理系统的执行单位,可以是一个数据库操作(如Select操作)或者是一组操作序列。事务ACID属性,即原子性(Atomicity)、一致性(Consisten...
分类:
数据库 时间:
2015-10-10 17:19:55
阅读次数:
209
Connection接口中定义了5中隔离级别常量Connection.TRANSACTION_NONE -- 不支持事务Connection.TRANSACTION_READ_UNCOMMITTED -- 脏读(事务回滚造成别的事务读取到的数据不准确),不可重复读和幻读均可发生Connection....
分类:
数据库 时间:
2015-10-09 13:35:19
阅读次数:
284
1.事务的开始结束:START TRANSACTION :标记事务开始COMMIT :标记事务成功结束ROLLBACK :标记事务夭折2.设定事务只读、读写性质:SET TRANSACTION READ ONLY:设定事务为只读事务SET TRANSACTION READ WRITE : (默认状态...
分类:
数据库 时间:
2015-10-08 23:06:38
阅读次数:
183
https://github.com/dianping/catCATCAT基于Java开发的实时应用监控平台,包括实时应用监控,业务监控。[2013-01-06]CAT支持的监控消息类型包括:Transaction适合记录跨越系统边界的程序访问行为,比如远程调用,数据库调用,也适合执行时间较长的业务...
分类:
其他好文 时间:
2015-10-08 16:05:07
阅读次数:
147
QUESTION NO: 170
What methods of point-in-time recovery are available? (Choose all that apply.)A. Change-based
B. Cancel-based
C. Time-based
D. Sequence number-based
E. Transaction number-base...
分类:
其他好文 时间:
2015-10-07 18:59:33
阅读次数:
290
QUESTION NO: 114
A user performs an update on a table. Shortly after committing the transaction, they realize that they had
an error in their WHERE clause causing the wrong rows to be updated. Which...
分类:
其他好文 时间:
2015-10-05 13:05:26
阅读次数:
134
在构造以及析构函数期间不要调用virtual函数,因为这类调用从不下降到derived class中。例如说下面这个例子: 1 class Transaction{ 2 public: 3 Transaction(); 4 virtual void logTransactions()...
分类:
其他好文 时间:
2015-10-05 12:50:40
阅读次数:
139
QUESTION 63
Which method would you use to undo the changes made by a particular transaction without affecting
the changes made by other transactions?
A. point-in-time recovery
B. execute the ROLLBA...
分类:
其他好文 时间:
2015-09-30 11:16:27
阅读次数:
138
Say you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to complete at most one transaction (ie...
分类:
其他好文 时间:
2015-09-28 20:58:50
阅读次数:
218