SQL ERROR

Location: /home/www/act.or.th/httpdoc/th/slide_detail/index.php (line 43)
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 '' at line 1 [1064]
select * from tbl_slide_news where slide_id =
An sql error occurred while fetching this page. Please contact an administrator if this problem persists.