SQLite3 Terminal Output Formatting .width

The sqlite3 tool has no such function.

You would have to compute the column widths by hand (SELECT max(length(col1)) ...).

From the documentation of SQLite:

If you specify a column a width of 0, then the column width is automatically adjusted to be the maximum of three numbers: 10, the width of the header, and the width of the first row of data. This makes the column width self-adjusting. The default width setting for every column is this auto-adjusting 0 value.