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如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
...相关的语句 必须具有DBA 的权限 虽然这条语句很普通 但是需要的时候很管用 能够及时查出一个人执行sql语句情况
-------oracle 查看已经执行过的sql 这些是存在共享池中的 --------->
select * from v$sqlarea t order by t.LAST_ACTIVE_TIME desc
...
Comments in Markdown
...not be able to see it, even with "view source") you could (ab)use the link labels (for use with reference style links) that are available in the core Markdown specification:
http://daringfireball.net/projects/markdown/syntax#link
That is:
[comment]: <> (This is a comment, it will not be inc...
How do I determine k when using k-means clustering?
...ange_n_clusters:
clusterer = KMeans(n_clusters=n_clusters)
cluster_labels = clusterer.fit_predict(dataToFit)
silhouette_avg = silhouette_score(dataToFit, cluster_labels)
if silhouette_avg > previous_silh_avg:
previous_silh_avg = silhouette_avg
best_clusters = n_clu...
What characters are allowed in an email address?
...dards (Request for Comments) for protocols mandate that component hostname labels may contain only the ASCII letters a through z (in a case-insensitive manner), the digits 0 through 9, and the hyphen (-). The original specification of hostnames in RFC 952, mandated that labels could not start with a...
从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...
图片摘自Mahout in Action
从上图中我们可以看到，算法是被模块化的，通过1,2,3,4的过程进行方法调用。
程序代码：
public class UserCF {
final static int NEIGHBORHOOD_NUM = 2;
final static int RECOMMENDER_NUM = 3;
public static void main...
App Inventor 2 LLMAI2Ext 自研拓展：接入DeepSeek、Kimi、通义千问...等国...
...拓展的初衷
App Inventor 2 原生的ChatGPT组件由于是国外的，使用起来不太便捷，且各种限制。
如今我们又身处AI浪潮之中，包括很多学校在内的国内用户都有AI结合传统的App来开发具有智能App的需求，因此，必须开发拓...
Why does !{}[true] evaluate to true in JavaScript?
... @t.niese, because it's parsed as a statement block containing a label (key:) and a string literal ("value"), followed by an array. The parser still does not see an object literal.
– Frédéric Hamidi
Oct 31 '13 at 9:54
...
how to use ng-option to set default value of select element
...n <select> with ng-options. Also it will work if you have different label/values.
* This is from Angular 1.2.7
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What can , and be used for?
...action="#{bean.search}" />
</f:metadata>
...
<form>
<label for="query">Query</label>
<input type="text" name="query" value="#{empty bean.query ? param.query : bean.query}" />
<input type="submit" value="Search" />
<h:message for="query" />...
Text-align class for inside a table
... class="table price-table">
<thead>
<th class="price-label">Total</th>
</thead>
<tbody>
<tr>
<td class="price-value">$1,000,000.00</td>
</tr>
</tbody>
</table>
And just apply the text-a...