基本原则：封装变化Encapsulatewhatvaries.面向接口编程而非实现Codetoaninterfaceratherthantoanimplementation.优先使用组合而非继承FavorCompositionOverInheritance1.SRP----单一责任原则2.OCP--...
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其他好文 时间：
2015-03-11 12:36:19
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145
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QUESTION 1
You need to load information about new customers from the NEW_CUST table into the tables CUST and CUST_SPECIAL. If a new customer has acredit limit greater than 10,000, then the detai...
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2015-03-09 10:59:39
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108
FROM:http://blog.itpub.net/26736162/viewspace-1252569/?page=2http://blog.csdn.net/elearnings/article/details/101036111.View the Exhibit and examine th...
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2015-03-01 00:16:59
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195
61. View the Exhibit.Which statement regarding the dept and emp tables is true?A) When you delete a row from the emp table, you would receive a constr...
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其他好文 时间：
2015-02-27 16:53:58
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327
61. You are working in an online transaction processing (OLTP) environment. You realize that the salary for an employee, John, has been accidentally m...
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2015-02-27 16:52:33
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464
1. Because of a power outage,instance failure has occurred. From what point in the redo log does recovery begin and where does it end?A. Current redo ...
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2015-02-27 16:50:49
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290
1.You observe that a database performance has degraded overa period of time. While investigating the reason, you find the size ofthe database buffer c...
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2015-02-27 16:50:11
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743
121. You want to create a new optimized database for your transactional production environment to be used by a financial application. While creating t...
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2015-02-27 16:40:43
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288
131. Which three methods can you use to run an Automatic Database Diagnostic Monitor (ADDM) analysis over a specific time period? (Choosethree.)A. Ent...
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2015-02-27 16:34:14
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199
131. Which view would you use to display the column names and DEFAULT valuesfor a table?A. DBA_TABLESB. DBA_COLUMNSC. USER_COLUMNSD. USER_TAB_COLUMNSA...
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其他好文 时间：
2015-02-27 16:30:24
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426
