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SQL语句错误: select wkcx_content.news_title,wkcx_content.id,wkcx_content.news_order,wkcx_content.tuijian,wkcx_content.add_time,wkcx_class.id as cat_id,wkcx_class.class_name,wkcx_content.counter from wkcx_content,wkcx_class where cat_id = 1249 AND wkcx_class.id = wkcx_content.cat_id and wkcx_content.type != 3 and wkcx_content.add_time>'2020-12-31' union select wkcx_content.news_title,wkcx_content.id,wkcx_content.news_order,wkcx_content.tuijian,wkcx_content.add_time,wkcx_class.id as cat_id,wkcx_class.class_name,wkcx_content.counter from wkcx_content,wkcx_class where wkcx_content.cat_id IN(select wkcx_class.id from wkcx_class WHERE pid = 1249) AND wkcx_class.id = wkcx_content.cat_id and wkcx_content.type != 3 and wkcx_content.add_time>'2020-12-31' ORDER BY add_time DESC ,id DESC,news_order asc limit -22,22
错误信息: 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 '-22,22' at line 3
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