The first column of a table is used by default in Timetonic as a key, i.e. it allows to uniquely identify a record in a table.
| It is an essential element for links since it is the first column of the linked table that will be displayed on your link field to another table. |
Type of columns that can be in first position
| Column type | Possible 1st column |
| Simple text | X |
| X | |
| Number | X |
| Select | X |
| Checkbox | X |
| Date | X |
| Phone number | X |
| X | |
| Attachment | |
| URL | |
| Formulas | X |
| Color select | |
| X | |
| X | |