Is your feature request related to a problem? Please describe.

I can't specify that a column's values need to be unique. If Tables is to be considered anything like a database, then this would be essential.

Describe the solution you'd like

Just like there's a "required" switch on the column creation dialog (NOT NULL), a "unique" switch should be there too. Row creation should fail if the value is not unique.

Describe alternatives you've considered

No response

Additional context

No response