The column specifier must be a valid column. You can use the column specifier to refer to columns by the order that they appear in the query. The first column in the query is numbered 1.

You can include more than one column in the ORDER BY clause, separated by using commas.

The optional direction specifier can be either ASC for ascending (low to high) or DESC for descending (high to low). If you do not provide a direction specifier, the default, ASC, is used. If you specify more than one column, but do not specify all directions, the direction you specify last is applied to each column until you explicitly change the direction.

For example, in the following ORDER BY clause, the columns A, B, C, and G are sorted in ascending order, while columns D, E, and F are sorted in descending order.

…ORDER BY A ASC, B, C, D DESC, E, F, G ASC