小编San*_*per的帖子

我有这个我在PostgreSQL中编写的查询返回错误说:

[错误]错误:第
3行:FROM(选择DISTINCT(可识别)AS made_only_recharge

这是整个查询:

SELECT COUNT (made_only_recharge) AS made_only_recharge
FROM (
    SELECT DISTINCT (identifiant) AS made_only_recharge
    FROM cdr_data
    WHERE CALLEDNUMBER = '0130'
    EXCEPT
    SELECT DISTINCT (identifiant) AS made_only_recharge
    FROM cdr_data
    WHERE CALLEDNUMBER != '0130'
)

我在Oracle中有一个类似的查询工作正常.唯一的变化是我EXCEPT在Oracle中的位置我用MINUS关键字取代了它.我是Postgres的新手,不知道它的要求.处理这个问题的正确方法是什么？

任何人都可以解释存储过程和用户​​定义函数之间的确切区别,以及每个上下文有用吗？

我讨厌重复功能,特别是在Excel公式中.有什么方法我可以避免这样的事情:

=IF( VLOOKUP(A1, B:B, 1, 0) > 10, VLOOKUP(A1, B:B, 1, 0) - 10, VLOOKUP(A1, B:B, 1, 0) )

[以上只是问题的一个简单示例,而不是我正在使用的特定公式.]

当我使用Netbeans运行我的Java项目时,我收到以下错误:

Deployment error:
Starting of Tomcat failed, the server port 8080 is already in use.
See the server log for details.
        at org.netbeans.modules.j2ee.deployment.devmodules.api.Deployment.deploy(Deployment.java:166)
        at org.netbeans.modules.j2ee.ant.Deploy.execute(Deploy.java:104)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
        at sun.reflect.GeneratedMethodAccessor619.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.tools.ant.Target.performTasks(Target.java:385)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1298)
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1181)
        at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:277)
        at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:460)
        at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:151)
Caused by: org.netbeans.modules.j2ee.deployment.impl.ServerException: Starting of Tomcat failed, the server port 8080 is already in use.
        at org.netbeans.modules.j2ee.deployment.impl.ServerInstance._start(ServerInstance.java:1297)
        at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.startTarget(ServerInstance.java:1251)
        at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.startTarget(ServerInstance.java:1062)
        at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.start(ServerInstance.java:939)
        at …

我正在Excel 2007中进行一些VBA编程,并且有一个工作簿将所有数据表从中复制到另一个工作表中.新表将有几个标题行,我想跟踪它们的位置,所以我不必经常在其中找到单词.

在Excel文档打开时,使用类并保持它们运行是最简单的方法吗？或者这会使它变得沉重和难以处理,我应该继续使用子程序？使用类有什么好处？它不像我有几个对象,只有工作表和列上的验证.

如何在控制台UTF8字符中打印？

随着Console.Writeline("î??â?")我看到îasât控制台.

如何使用Excel VBA宏查找字符串中正斜杠字符(/)的出现次数？

当我用github的问题页面写评论时,我注意到即使我重新加载浏览器,评论正文仍然存在.

我检查了localStorage,sessionStorage,cacheStorage,IndexedDB,cookie,但我没有找到我写的句子的实例.

另外,我检查了Chrome Devtool的网络标签,但我找不到任何可疑的网络流量.

github.com如何实现这种恢复功能？

我试图在一个小组内获得正确的排名,并且结果有问题.我需要在每次基于时间戳更改组时获得排名.

例如,使用此表:

create table syntrans (
    transid     number,
    launchtime  timestamp,
    status      varchar2(10)
);

insert into syntrans values ( 1, '19-APR-17 07.34.05.824875 PM','FAIL');
insert into syntrans values (  1, '19-APR-17 07.34.06.828753 PM','FAIL');
insert into syntrans values (  1, '19-APR-17 07.34.08.567579 PM','SUCCESS');
insert into syntrans values (  1, '19-APR-17 08.07.31.731745 PM','SUCCESS');
insert into syntrans values (  1, '19-APR-17 08.07.32.735582 PM','SUCCESS');
insert into syntrans values (  2, '19-APR-17 08.17.51.332804 PM','FAIL');
insert into syntrans values (  2, '19-APR-17 08.17.52.336530 PM','FAIL');
insert into syntrans values …

我一直在为初学者观看python上的bucky roberts视频，并且我正在尝试使用视频中的类似代码为Wikipedia页面构建基本的网络抓取工具。

import requests
from bs4 import BeautifulSoup

def main_page_spider(max_pages):
page_list={1: "Contents",
           2:"Overview",
           3:"Outlines",
           4:"Lists",
           5:"Portals",
           6:"Glossaries",
           7:"Categories",
           8:"Indices",
           9:"Reference",
           10:"Culture",
           11:"Geography",
           12:"Health",
           13:"History",
           14:"Mathematics",
           15:"Nature",
           16:"People",
           17:"Philosophy",
           18:"Religion",
           19:"Society",
           20:"Technology"}
    for page in range(1,max_pages+1):
        if page == 1:
            url = "https://en.wikipedia.org/wiki/Portal:Contents"
        else:
             url = "https://en.wikipedia.org/wiki/Portal:Contents/" + str(page_list[page])
        source_code = requests.get(url)
        plain_text = source_code.text
        soup = BeautifulSoup(plain_text, "html.parser")
        divs = soup.find('div', {'class': "mw-body-content", 'id': "bodyContent"})

        for link in divs.findAll('a'):
            href = "https://en.wikipedia.org" + str(link.get("href"))
            get_link_data(href)
            print(href)

def get_link_data(link_url):
    source_code = …