1818 分组聚合查询接口 App.Table.FreeAF

请求（where和where_X二选一）：
{你的接口域名}/?s=App.Table.FreeAF&model_name=article&op_fun=SUM&op_field=view_times&group_filed=title&where=[["id",">",0]]&app_key={你的app_key}&sign={动态签名}

请求（where和where_X二选一）：
{你的接口域名}/?s=App.Table.FreeAF&model_name=article&op_fun=SUM&op_field=view_times&group_filed=title&where_id=GT-0&app_key={你的app_key}&sign={动态签名}

上面查询相当于，SELECT title, SUM(view_times) AS total_num FROM article WHERE id > 0 GROUP BY title ORDER BY total_num ASC LIMIT 0,10

返回：
{
    "ret": 200,
    "data": {
        "err_code": 0,
        "err_msg": "",
        "items": [
            {
                "title": "这是一篇文章标题",
                "total_num": "100"
            },
            {
                "title": "这又是另一篇文章标题",
                "total_num": "200"
            },
            // 略……
        ],
        "total": 12
    },
    "msg": ""
}


示例2-附加更多选择字段select_more：
请求：
{你的接口域名}/?s=App.Table.FreeAF&model_name=article&op_fun=SUM&op_field=view_times&group_filed=title&where=[["id",">",0]]&select_more=post_time,state@COUNT&app_key={你的app_key}&sign={动态签名}

上面查询相当于：SELECT post_time, COUNT(state) AS state_AT_COUNT, title, SUM(view_times) AS total_num FROM pa_article_tbl WHERE AND (id > 0) GROUP BY title ORDER BY total_num ASC LIMIT 0,10

返回：
{
    "ret": 200,
    "data": {
        "err_code": 0,
        "err_msg": "",
        "items": [
            {
                "post_time": "1970-01-01 00:00:00",  // 对应参数：select_more=post_time
                "state_AT_COUNT": "1", // 对应参数：select_more=state@COUNT
                "title": "这是一篇文章标题",
                "total_num": "100"
            },
            {
                "post_time": "1970-01-01 00:00:00",
                "state_AT_COUNT": "1",
                "title": "这又是另一篇文章标题",
                "total_num": "200"
            },
            // 略……
        ],
        "total": 22
    },
    "msg": ""
}