zoukankan      html  css  js  c++  java
  • 封装sql语句中in限制查询个数的方法

        /*  
         * 此方法用于每天凌晨取前一天的回滚用户账号
         */
        public function getRollBackAccount($startTime,$endTime){
            
            //1.首先查询出当天的新增的用户账号    
            $sql_account = "SELECT DISTINCT `accountName`,`mTime` FROM `t_log_register` WHERE `mTime`>='{$startTime}' AND `mTime`<='{$endTime}'";
            $day_account = fetchRowSet($sql_account);
    
            foreach ($day_account as $key => $account) {
                $arr[] = $account['accountName'];    
               }
    
            // 统计回滚用户的时间范围限制两个月内  
            //$two_months_before_time = strtotime(date("Y-m-d", strtotime("-2 month")));
            $now_end_time = $endTime-86400;
            // 批量查询限制
            $count_account = count($arr);
            $base = 10;
            $group = floor($count_account / $base);
            for ($i=0; $i <= $group; $i++) { 
                echo  '<br>group: ' . $i . "<br>";
                $group_account = '';
                for ($j=0; $j < $base; $j++) { 
                    $key = $i * $base + $j;
                    if($key < $count_account) {
                        $group_account .= "'" . $arr[$key] . "',";
                    }
                }
                $group_account = rtrim($group_account, ',');
    
                $sql_all_account = "SELECT DISTINCT `accountName`,`agentId`,`serverId`,`platform`,`mTime` FROM `t_log_register` WHERE `accountName` in ({$group_account}) AND `mTime` < '{$now_end_time}' ";
                $all_account = fetchRowSet($sql_all_account);    
    
                   if(!empty($all_account)){
                      break;
                   }     
            }
         
            $arr_account = array();
               foreach ($all_account as $key => $before_account) {
                   $arr_account[$key]['agentId'] = $before_account['agentId'];
                   $arr_account[$key]['serverId'] = $before_account['serverId'];
                   $arr_account[$key]['platform'] = $before_account['platform'];
                $arr_account[$key]['accountName'] = $before_account['accountName'];
                   $arr_account[$key]['mTime'] = $before_account['mTime'];    
               }
               return $arr_account;    
        }
  • 相关阅读:
    算法学习概述(2016.6)
    java异常和错误类总结(2016.5)
    java string 细节原理分析(2016.5)
    MySQL 5.7.18 解压版安装
    Struts2的<s:date>标签使用详解[转]
    jprofile查看hprof文件[转]
    iBatis的Settings节点参数详解[转]
    window.open、window.showModalDialog和window.showModelessDialog 的区别[转]
    oracle 字典表查询
    oracle 表空间操作
  • 原文地址:https://www.cnblogs.com/lonmyblog/p/8277440.html
Copyright © 2011-2022 走看看