Table data cells can be lengthened to span two or more rows or columns by adding the apppropriate ROWSPAN or COLSPAN attribute to the TD cell.

In this way complex table-settings can be achieved:

The Inner Planets

	Distance from Sun		Year Length	Day Length
	Kilometres	AUs
Mercury	57,900,000	.38	88 days	59 days
Venus	108,200,000	.72	225 days	243 days
Earth	149,600,000	1.0	365 days	24 hrs
Mars	227,900,000	1.5	687 days	24.6 hrs