1.创建测试表并添加一些对应数据

sh_user_visit_202405 uid,create_time
sh_user_visit_202406 uid,create_time
sh_user_visit_202407 uid,create_time

2.格式化表

//获取表数组
public function getListByCross($table_prefix, $start_date, $end_date){if($end_date > date("Y-m-d H:i:s", time())){$end_date = date("Y-m-d H:i:s", time());}$startY = date('Y',strtotime($start_date)); //开始时间所在年份$startm = date('m',strtotime($start_date));  //开始时间的开始月份$endY = date('Y',strtotime($end_date));  //结束时间所在年份$endm = date('m',strtotime($end_date));  //结束时间的开始月份$ym_arr = [];//获取跨年月数组if($startY==$endY){ //不跨年for($i=$startm;$i<=$endm;$i++){$ym_arr[] = $startY.str_pad($i,2,'0',STR_PAD_LEFT);}}else{ //跨年跨月$dostartY = $startY;do{if($startY==$dostartY){for($i=$startm;$i<=12;$i++){$ym_arr[] = $startY.str_pad($i,2,'0',STR_PAD_LEFT);}}elseif($startY < $endY){for($i=0;$i<=12;$i++){$ym_arr[] = $startY.str_pad($i,2,'0',STR_PAD_LEFT);}}else{for($i=1;$i<=$endm;$i++){$ym_arr[] = $startY.str_pad($i,2,'0',STR_PAD_LEFT);}}$startY++;}while($startY<=$endY);}$tables = [];foreach($ym_arr as $val){$tables[] = $table_prefix . $val;}return $tables;
}

3.调用

public function test(){$params = $this->request->param();if(!isset($params['start_date']) && !isset($params['end_date'])){return $this->success("ok",[]);}// 分页设置$page = $params['page'] ?? 1; // 当前页码$limit = $params['limit'] ?? 15; // 每页显示的记录数$offset = ($page - 1) * $limit; // 计算偏移量// 初始化相关变量$table_prefix = "sh_user_visit_";$start_date = $params['start_date']; //查询开始时间$end_date = $params['end_date']; //查询结束时间$start = $table_prefix.date('Ym',strtotime($start_date));$isTable = Db::query("SHOW TABLES LIKE '{$start}'");if (!$isTable) {return $this->error("日期错误");}//获取表数组$tables = $this->getListByCross($table_prefix, $start_date, $end_date);//条件查询$where_str = "`create_time` BETWEEN '".$start_date."' AND '".$end_date."'";if(isset($params['uid']) && $params['uid'] != ''){$where_str .= 'AND uid = '. $params['uid'];}$union_query = '';foreach ($tables as $table) {if ($union_query != "") {$union_query .= " UNION ALL ";}$union_query .= "SELECT * FROM {$table} WHERE ". $where_str;}// 获取总记录数$total_query = "SELECT COUNT(*) AS total FROM ({$union_query}) AS unioned_tables";$result = Db::query($total_query);$count = $result[0]['total'];// 分页查询$paged_query = "{$union_query} LIMIT $limit OFFSET $offset";$result = Db::query($paged_query);$data = ['page' => $page,'count' => $count,'data' => $result];return $this->success("ok",$data);
}