def get_columns(table_name)
			columns_arr = []
		    pst = @db.prepare "SELECT * FROM #{table_name} LIMIT 6"
		    pst.columns.each do |c|
		    	columns_arr.push(c)
		    end
		  columns_arr
		end
def get_columns(table_name)
			columns_arr = []
		    pst = @db.prepare "SELECT * FROM #{table_name} LIMIT 6"
		    pst.columns.each do |c|
		    	columns_arr.push(c)
		    end
		  columns_arr
		end
Get all colums for a given table.