johano
26
@whitewall, the template plugin is quite useful for a selection of skeleton tables. Then it's just Ctrl+Alt+I to paste your boilerplate table into a note, and from there to copy and paste a bunch of extra rows, or select and delete several rows as required.
For anything other than small tables though, I usually use the external editor facility (Typora here)—it allows easy set up of the number of columns and rows, and the insertion/deletion of columns/rows without fuss. Much easier than CodeMirror for bigger tables.