Sometimes, tables with two title rows are required. Is it possible to
define a table style, which will take this into account? How?

E.g.

No | Today | Yesterday |
| AM | PM | AM | PM |
1 | 5 | 8 | 3 | 4 |

In this case BOTH first rows are title rows, and they should be
formatted the same way.

Thanks for the answer.

Marko