Reply To: Trying to resize a table, frame resizing but not table..?

A table is technically one character in your main flow. So this fitting-thing won’t work. There are several ways to reach the goal:
Insert a new row above row one, merge the cells and give this one cell in row one the width of your frame. Select then your columns, and choose e.g. distribute all columns.

Cause this can be time consuming in many tables, there exists scripts (at indesignsecrets and at the scripting adobe forum), that can help you.

Kai