Answer by Nathan Skerl

You can also play with replace to "count" the number of characters like so:

declare @s varchar(15)            
set @s = 'abc#def#ghi'            
if (len(@s) - len(replace(@s, '#', ''))) > 1            
begin            
    print 'more than one found'            
end else            
begin            
    print 'less than one found'            
end            
/* against table            
select  *            
from    dbo.YourTable            
where   len(YourColumn) - len(replace(YourColumn, '#', ''))) > 1            
*/