For example, IF the top left cell is a fixed height, this is easy: instead of nesting a table in the left column, nest divs (so table cell - div - div).

For example, draw one horizontal line and one vertical line to create a 2-by-2 table. This 2-by-2 is now nested inside of the larger outer table.

Nested data structures are a boon to modeling, storage, and query performance, but pose challenges to traditional BI tools. Here’s how to overcome them ...