The Sort() message rearranges the rows of a table according to the values of one or more columns, either replacing the current table or creating a new table with the results. Specify ascending or descending sort for each By column.
dt << Sort(("<Private>"|"<Invisible>"), <Replace Table>, By(columns), Order(Descending | Ascending), <Output Table Name(name))>
The following example creates a new data table based on Big Class.jmp that sorts the data in descending order by age and by name:
dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
sortedDt = dt << Sort(
By( :age, :name ),
Order( Descending, Ascending ),
Output Table Name( "Sorted age name" ) );
You can also use an associative array to sort values in a column. The associative array gives you a quick look at unique values in a column. See Sort a Column’s Values in Lexicographic Order.