<div>MySQL 오류 입니다.</div><div>━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━</div><div><b>Mysql_Query : </b>SELECT
                    *,
                    LAG(`chat_type`) OVER(ORDER BY `uid`) AS `prev_type`,
                    LAG(`chat_name`) OVER(ORDER BY `uid`) AS `prev_name`,
                    LEAD(`chat_type`) OVER(ORDER BY `uid`) AS `next_type`,
                    LEAD(`chat_name`) OVER(ORDER BY `uid`) AS `next_name`,
                    LEAD(`chat_date`) OVER(ORDER BY `uid`) AS `next_date`
                FROM
                    `chat_data`
                 WHERE `chat_kind` = 'lee' 
                ORDER BY
                    `uid` ASC
                LIMIT
                    -500, 500</div><div><b>Mysql_Error : </b>You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '-500, 500' at line 14</div><div><b>Mysql Error Num : </b>1064</div><div>━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━</div>