table-insert-column

table-insert-column is an interactive autoloaded compiled Lisp function in `table.el'.

It is bound to <menu-bar> <tools> <Table> <Insert> <Column>.

(table-insert-column N)

Insert N table column(s).
When point is in a table the newly inserted column(s) are placed left
of the current column. When point is outside of the table it must be
right side of the table within the table height range, then the newly
created column(s) are appended at the right of the table.