<!--删除用户那么与之用户相关联的所有信息都将被删除。根据用户的unionid删除所有相关数据 -->
<delete id="deleteUserinfoByid">
DELETE
tb_userinfo,
tb_attention,
tb_building,
tb_code,
tb_collection,
tb_information,
tb_recommend,
tb_records,
tb_forum
FROM
tb_userinfo
LEFT JOIN tb_attention ON (tb_userinfo.unionid = tb_attention.unionids)
LEFT JOIN tb_building ON (tb_userinfo.account = tb_building.account)
LEFT JOIN tb_code ON (tb_userinfo.unionid = tb_code.unionid)
LEFT JOIN tb_collection ON (tb_userinfo.unionid = tb_collection.unionid OR tb_building.id = tb_collection.bid)
LEFT JOIN tb_information ON (tb_userinfo.unionid = tb_information.unionid)
LEFT JOIN tb_recommend ON (tb_userinfo.unionid = tb_recommend.unionid)
LEFT JOIN tb_records ON (tb_userinfo.unionid = tb_records.unionid)
LEFT JOIN tb_forum ON (tb_userinfo.unionid = tb_forum.unionid)
WHERE
tb_userinfo.unionid = #{unionid}<!--条件,传入的参数 -->
</delete>
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