Question

我有此查询可以在销售日期字段中合并日期。

一旦此人有超过3个购买日期并且我们运行查询，他们根本不会显示。如果他们有两个或三个不是问题，只要有四个日期来组合它就会一起跳过这条线。

<?php
set_time_limit(0);
$server = 'localhost';
$login = 'xxxx';
$password = 'xxxx';
$db = 'opg';
$table = 'OPG';
$filename = '/home/.sites/143/site2/web/csv/OPG.csv';

mysql_connect($server, $login, $password);
mysql_select_db($db);

$fp = fopen($filename, "w");

$query = 'SET GLOBAL group_concat_max_len=15000';

mysql_query($query);

$res = mysql_query("SELECT t1.employee_number, t1.first_name, t1.last_name
      , GROUP_CONCAT( DATE_FORMAT( t1.dates_of_purchase, '%m-%d-%y' ) SEPARATOR ' & ' ) AS Purchase_Date
      , t1.Dept, t1.Location
  FROM OPG AS t1 
  LEFT JOIN OPG AS t2 ON ( t1.employee_number = t2.employee_number
      AND t1.last_name = t2.last_name
      AND t1.QTY != t2.QTY ) 
  WHERE t1.dates_of_purchase >= '2011-01-01'  
      AND t1.QTY >=1 
      AND t2.employee_number IS NULL 
  GROUP BY t1.employee_number, t1.first_name, t1.last_name
  ORDER BY t1.employee_number
");

mysql_data_seek($res, 0);

while($row = mysql_fetch_assoc($res)) {
    $line = "";
    $comma = "opg,";
    foreach($row as $value) {
        $line .= $comma . '' . str_replace('', '', $value) . '';

        $comma = ",";
    }
    $line .= "\n";
    fputs($fp, $line);
}

fclose($fp);`

这是代码，它在大多数情况下都有效。为什么在超过3个购买日期之前不会返回任何行？

以下是数据：

Account   employee_number     first_name  last_name   dates_of_purchase   Dept    Location    QTY     Vendor  id
  ONTH30  652526  G   HARRIPERSAD     2011-02-16  PWU     NUCLEAR SUPPLY CHAIN    1   MSS     1836
  ONTH30  652561  AJJ     FELS    2011-09-15  PWU     NOSS    1   MSS     4319
  ONTH30  652561  AJJ     FELS    2011-06-23  PWU     NOSS    1   MSS     8898
  ONTH30  652561  AJJ     FELS    2011-08-18  PWU     NOSS    1   MSS     8938
  ONTH30  652526  G   HARRIPERSAD     2011-11-16  PWU     PICKERING   1   MSS     7231
  ONTH30  652561  AJJ     FELS    2011-12-08  PWU     NOSS    -1  MSS     8141
  ONTH30  652561  AJJ     FELS    2011-10-13  PWU     NOSS    1   MSS     9055

输出中缺少的数据是员工编号652561。它不会输出到CSV文件，因为某种原因它会一起跳过它。

输出应如下所示：

opg, 652561, AJJ, FELS, 10-13-2011 & 12-08-2011 & 08-18-2011 & 06-23-2011 & 09-15-2011 , ESR, PICKERING A

Query中缺少数据

0 个答案: