386.You have just performed a FLASHBACK TABLE operation using the following command:
flashback table employees to scn 123456;
The employees table has triggers associated with it. Which of the follow...
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其他好文 时间：
2015-07-11 15:13:30
阅读次数：
153
In order to exchange messages, producers and consumers (clients) need to connect tothe broker. This client-to-broker communication is performed throug...
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其他好文 时间：
2015-07-10 13:02:38
阅读次数：
101
Applications must synchronize access to variables that are shared by multiple threads.
Applications must also ensure that operations on these variables are performed atomically (performed in their en...
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数据库 时间：
2015-07-09 13:19:09
阅读次数：
116
访问者模式：
定义了一个作用于一个类的一些操作，访问者模式允许在不改变类的前提下增加一些操作。
Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the classes of...
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其他好文 时间：
2015-07-01 16:00:10
阅读次数：
157
$.getScript("ajax/test.js", function() { alert("Load was performed."); });等价于:$.ajax({ url: url, dataType: "script", success: success});
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编程语言 时间：
2015-06-04 11:38:58
阅读次数：
127
Description
You are given two pots, having the volume of A and B liters respectively. The following operations can be performed:
FILL(i) fill the pot i (1 ≤ i ≤ 2) from the tap;DROP(i) ...
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其他好文 时间：
2015-05-05 22:02:17
阅读次数：
142
Description
A common pastime for poker players at a poker table is to shuffle stacks of chips. Shuffling chips is performed by starting with two stacks of poker chips, S1 and S2, each stack contain...
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其他好文 时间：
2015-05-05 12:39:12
阅读次数：
149
一、问题起源在MySQL的官方文档中有明确的说明不支持嵌套事务：1. Transactions cannot be nested. This is a consequence of the implicit commit performed for any current transaction w...
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数据库 时间：
2015-04-28 20:15:49
阅读次数：
245
一、问题起源 在MySQL的官方文档中有明确的说明不支持嵌套事务： [sql]?view plaincopy Transactions?cannot?be?nested.?This?is?a?consequence?of?the?implicit?commit?performed?for?any?curre...
分类：
数据库 时间：
2015-04-23 16:00:56
阅读次数：
155
一、问题起源
在MySQL的官方文档中有明确的说明不支持嵌套事务：
1. Transactions cannot be nested. This is a consequence of the implicit commit performed for any current transaction when you issue a START TRANSACTION statement or...
分类：
数据库 时间：
2015-04-23 15:49:47
阅读次数：
179
