Creating alternate keys with Visio ERD diagrams

Question

I'm trying out Visio for the first time today, creating ERD's. Is it possible to specify alternate keys in addition to PK's in Visio ERD diagrams. I can't see any way to define more than one key on a table.

Any ideas? Cheers.

Answer 1

One way to do this is by creating a Unique Index on the column.

1. Click the table on design surface to select the table
2. Click Indexes
3. Create new index column, by default indexes are non-unique, the next step fixes this
4. In the 2nd drop-down list, select Unique Index (VISIO offer 3 types)

There should be a way to display AKn of the left hand column of the design surface, but I don't know how to do this.