You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '\xD6\xB8\xCE\xC6\xBF\xBC\xC7\xDA\xBB\xFA='\xD6\xB8\xCE\xC6\xBF\xBC\xC7\xDA\xBB\x' at line 1 - Execute Query False! Select count(*) as dd From dede_guard left join dede_addonguard on ID = dede_addonguard.aid where arcrank > -1 And channel>-1 And channel = '20' And 指纹考勤机='指纹考勤机报价' limit 0,1;