mysql去除查询字段的空格

因为mysql查询的时候精确到空格，所以，想要去去除中间的空格除了用正则以外，mysql写法：

select * from cityall where trim(replace(cityEn,' ','')) = trim(replace('San Fra nc i s c o',' ','')) 
and  trim(replace(countryEn,' ','')) = trim(replace('UnitedStates',' ',''));