select *
from companys
where sellCategoryCode like '%' + convert(varchar(2),类别) + '%'
or buyCategoryCode like '%' + convert(varchar(2),类别) + '%'
from companys
where sellCategoryCode like '%' + convert(varchar(2),类别) + '%'
or buyCategoryCode like '%' + convert(varchar(2),类别) + '%'
or charindex(':5:',':'+buyCategoryCode+':')>0