2016-10-26 11:07发布
policy(策略表)policy_id,(策略编号)hero_id,(参考Friends表中的hero_id)friend_id,(参考Friends表中的hero_id)
friends(好友表)hero_id,hero_name,hero_level
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select * from policy a left join friends b on a.xx=b.xx(ab关系字段)
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select * from policy a left join friends b on a.xx=b.xx(ab关系字段)
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