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HomeBackend DevelopmentPHP Tutorial帮忙看个SQL有关问题

帮忙看个SQL问题

<br />SELECT ornamentation_images.ismark ismark,ornamentation_images.width width,ornamentation_images.height height,users.nickname name,ornamentations.id id,ornamentations.image_name image_name,ornamentations.image_url image_url,ornamentations.add_author add_author,ornamentations.browse_real_cnt browse_real_cnt,ornamentations.comnum comnum,users.head head,users.comnum unreadFROM `ornamentation_images` <br />LEFT JOIN users on ornamentation_images.add_author=users.id <br />LEFT JOIN ornamentations on ornamentation_images.ornamentation_id=ornamentations.id <br />WHERE ( ornamentations.enable = 0 ) AND ( ornamentations.checkstatus = 2 ) <br /> ORDER BY ornamentations.id desc LIMIT 0,5<br />

能查出来结果,只是没有查出来users表里的数据,问题出在哪?
------解决思路----------------------
表结构在哪呢
------解决思路----------------------
可能是left join 的问题
left join是以左表的记录为基础的,ornamentation_images可以看成左表,users可以看成右表,left join是以左表为准的.
换句话说,左表的记录将会全部表示出来,而右表只会显示符合搜索条件的记录,右表记录不足的地方均为NULL.

楼主可以查看一下,是否这个原因呢

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