^table.rename[old column name;new column name]
^table.rename[ $.old_column_name[new column name] … ] This method changes the name of one or several columns of the table.
Пример ^data.rename[ $.dt1[create_date] $.dt2[modify_date] ]
After executing the code the dt1 column will have the name create_date and the dt2 column - modify_date.