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 'then blocks.block_user_no !=board_talk.user_no
else (blocks.user_no != ' at line 2
query : SELECT board_talk.*, users.nickname as user_nickname FROM board_talk LEFT JOIN users ON board_talk.user_no = users.no LEFT JOIN blocks ON blocks.block_user_no=board_talk.user_no WHERE (title like '%%' or contents like '%%') and case when blocks.user_no=
then blocks.block_user_no !=board_talk.user_no
else (blocks.user_no != or blocks.no is null) end ORDER BY board_talk.no DESC LIMIT 0,30