Andreas wrote:
> can I habe multi table indices to ensure that certain IDs can only
> appear in on relation?
>
> Like
>
> table_0(id int), table_1(id int), table_2(id int)
> rel_1_to_0( id_1 int, id_0 int )
> rel_2_to_0( id_2 int, id_0 int )
>
> An id of table_0 should only exist either in rel_1_to_0 OR rel_2_to_0.
You cannot have one index across several tables.
> How can I do this?
Perhaps with a trigger that checks if the condition is satisfied.
Yours,
Laurenz Albe
