摘要:
1. 查找表中的重复记录(多字段) select * from data as a where (a.user_id,a.start_at,a.end_at) in (select user_id,start_at,end_at from data group by user_id,start_at 阅读全文
摘要:
封装一个redis操作,代码如下: class Redis { use Singleton; public static $redis = ""; //私有化构造函数 private function __construct() { // if (!extension_loaded('redis') 阅读全文