python查询数据库结果返回

python操做数据库，在查询中遇到几个使人恶心的问题，语句都没问题，就是报错。python sql_user_item_operationsdays = sql_user_item_operationsdays = 'select sum(opernum) as numbers from %s where user_id=%d and behavior_type=%d and diffdays>

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