Kontsevich and colleagues' logic seems to be the following: posing the unique criterion constraint (their eq. 2) and given the equality of the zFAs (or, equivalently, of p(FA)-s; their eq. 3), the ...

Version 9 produces a UNIQUE constraint on a column with AUTO_INCREMENT that is part of a composite primary key, where version 8 did not. CREATE TABLE `Child` ( `Order` int NOT NULL AUTO_INCREMENT, ...

I've got an interesting constraint I'm trying to add to our database. I can do with with triggers, but am curious if there is a more elegant way to do this in T-SQL (SQL2005, FWIW) We have two related ...

MySQL table primary keys and unique indexes prevent multiple rows with the same index from being added to the table. If you try to insert a duplicate row with a ...

I can confirm that the issue of the duckdb database file growing unbounded is indeed caused by the ART index. I'm currently using a small, but frequently updated and deleted duckdb database. It ...