Error: 1054 Unknown column 'keyword_relationships.rank' in 'order clause'

The following SQL statement was executed:
select * from (select distinct properties_rent.* from properties_rent,property_keywords where property_keywords.keyword_id='27140' and property_keywords.property_id=properties_rent.id and properties_rent.id!='2267054' and properties_rent.block is null and properties_rent.status!='n' order by property_keywords.rank desc ) sponsors union select * from ( select properties_rent.* from properties_rent, keyword_relationships where properties_rent.keyword_id=keyword_relationships.related_keyword_id and keyword_relationships.keyword_id='27140' and properties_rent.block is null and properties_rent.status ='n' and properties_rent.id!='2267054' order by keyword_relationships.rank desc, properties_rent.id desc ) normal limit 0,8

Error: 0

The following SQL statement was executed:
select count(*) counter from properties_rent where telephone = '51504876' and block is null

南京建邺南京出租房-西堤国际
在南京租房子  南京找房子：  非中介  

南京出租房-西堤国际

    发布日期：2008年05月14日
  • 建邺
  • 西堤国际
  • 3室2厅
  • 第10层/总11层
  • 127平方米
  • 1350 元/月
    		•
  • 水电,宽带,管道煤气,有线电视,电梯,车位
  • 新空房,环境好,交通便利.

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