public int findColumn(String columnLabel) throws SQLException {
		// TODO Auto-generated method stub
		int index = -1;
		for(int i = 1 ; i < table[0].length ; i++)
		{
			if(columnLabel.equals(metaData.getColumnName(i)))
			{
				index = i;
				break;
			}
		}
		if( index == -1)
			throw new SQLException();
		return index;
	}