小编bla*_*ack的帖子

我安装wamp.phpmyadmin工作正常.现在我已经安装了mysql命令行客户端,我无法从mysql命令行或phpmyadmin连接到我的数据库.重新启动后,我无法访问phpmyadmin #1045 Cannot log in to the MySQL server.除了我的mysql命令行不接受我的密码并拒绝我的配置文件:

C:\wamp\bin\mysql\mysql5.5.24

的my.ini

port=3306

我的config.inc.php

$cfg['Servers'][$i]['verbose'] = 'localhost';
$cfg['Servers'][$i]['host'] = 'localhost';
$cfg['Servers'][$i]['port'] = '';
$cfg['Servers'][$i]['socket'] = '';
$cfg['Servers'][$i]['connect_type'] = 'tcp';
$cfg['Servers'][$i]['extension'] = 'mysql';
$cfg['Servers'][$i]['auth_type'] = 'cookie';
$cfg['Servers'][$i]['user'] = 'root';
$cfg['Servers'][$i]['password'] = 'whtevr';
$cfg['Servers'][$i]['AllowNoPassword'] = false;

httpd.conf文件

listen port:80

C:\ Program Files\MySQL\MySQL Server 5.0

的my.ini

port:3306

再次,我重新安装mysql命令行,端口更改为3307

port:3307

WAMP可以很好地访问所有数据库,但是从mysql命令行客户端我无法访问我的所有数据库.它只是显示show databases;

information_schema 
mysql 
test

我试图在一个表(misc)中删除一个外键(id),这是表(main)中的主键(id).数据库名称(xxx)

alter table misc drop FOREIGN KEY id

我收到了这个错误

#1025 - 将'.\ times#sql-edc_27'重命名为'.\ interview\misc'时出错(错误号:150)

我有一个表格lead_submission,其中包含特定格式的用户的价值

agent_name     qa_details
xxx      1001:|1083:|504:Yes|1009:|
ccc      504:Yes|1083:No|1008:|1009:|

现在我想要504:Yes从两行得到的数量

这些值来自另一个表 paid_response

qno    paid_response
504     Yes
1083    No
1083    Possibly

<?php
//db connection goes here

$sql=mysql_query("select qno,paid_response from paid_response where qno='504' ");
while($rows=mysql_fetch_array($sql)) {    
$exqnos= $rows['qno'].'|'.$rows['paid_response'];
}

list($key,$val)=explode('|',$exqnos);
$exqno[$key]=$val;

foreach($exqno as $qno=>$value) {
$string .="qa_details LIKE '%|$qno:$value|%' ";  
}

$sql=mysql_query("SELECT count(agent_name) as agent_cnt,count($string) as ppicount FROM `lead_submission` WHERE $string "); ?>

               <table border="1">
                <thead>
                  <tr>
                    <th>CountAgent</th>
                    <th>504-COUNT</th>                      
                  </tr>

<?php
while($row=mysql_fetch_array($sql)) { ?>

     <tr style="color:red" >            
        <td><?php echo $row['agent_cnt']; …

我正在使用ubuntu 13.10xampp安装并成功运行opt/lampp/htdocs/xampp/www.路径是 .我已下载cakephp 2.4.6并将tar.gz文件解压缩到我的网络文件夹中 /opt/lampp/htdocs/xampp/www/cakephp

现在当我打

localhost/xampp/www/cakephp 它的表现

Warning: _cake_core_ cache was unable to write 'cake_dev_en-us' to File cache in /opt/lampp/htdocs/xampp/www/first_app/lib/Cake/Cache/Cache.php on line 325

Warning: /opt/lampp/htdocs/xampp/www/first_app/app/tmp/cache/persistent/ is not writable in /opt/lampp/htdocs/xampp/www/first_app/lib/Cake/Cache/Engine/FileEngine.php on line 384

Fatal error: Uncaught exception 'CacheException' with message 'Cache engine _cake_core_ is not properly configured.' in /opt/lampp/htdocs/xampp/www/first_app/lib/Cake/Cache/Cache.php:181 Stack trace: #0 /opt/lampp/htdocs/xampp/www/first_app/lib/Cake/Cache/Cache.php(151): Cache::_buildEngine('_cake_core_') #1 /opt/lampp/htdocs/xampp/www/first_app/app/Config/core.php(373): Cache::config('_cake_core_', Array) #2 /opt/lampp/htdocs/xampp/www/first_app/lib/Cake/Core/Configure.php(72): include('/opt/lampp/htdo...') #3 /opt/lampp/htdocs/xampp/www/first_app/lib/Cake/bootstrap.php(175): Configure::bootstrap(true) #4 /opt/lampp/htdocs/xampp/www/first_app/app/webroot/index.php(90): include('/opt/lampp/htdo...') #5 {main} thrown in /opt/lampp/htdocs/xampp/www/first_app/lib/Cake/Cache/Cache.php on …

我一直试图在不使用限制的情况下找到第三高的薪水.

在我使用的第二高工资的情况下

SELECT salary FROM table WHERE salary < ( SELECT MAX( salary ) order by salary desc

找到我使用的限制的第三高

select salary from one order by salary desc limit 3,1

现在如何在不使用限制的情况下找到第n个工资？