3 Answered Questions

[SOLVED] PostgreSQL multi-column unique constraint and NULL values

1 Answered Questions

[SOLVED] Optimal way to ignore duplicate inserts?

6 Answered Questions

2 Answered Questions

[SOLVED] SQL Server 2014 Concurrent input issue

1 Answered Questions

[SOLVED] How can I optimize my mysql setup to create my index faster?

5 Answered Questions

4 Answered Questions

[SOLVED] Why should a key be made explicit?

3 Answered Questions

[SOLVED] Unique combination key MySQL

1 Answered Questions

[SOLVED] Can column uniqueness be commutative?

3 Answered Questions

[SOLVED] Pairing Row Values in Any Order

2 Answered Questions

[SOLVED] PostgreSQL UPSERT issue with NULL values

4 Answered Questions

1 Answered Questions

1 Answered Questions

1 Answered Questions

[SOLVED] When to use unique composite keys?

2 Answered Questions

[SOLVED] Managing CTE execution order under uncertainty

2 Answered Questions

1 Answered Questions

1 Answered Questions

1 Answered Questions

[SOLVED] Can an Oracle IDENTITY column be nullable?

1 Answered Questions

1 Answered Questions

1 Answered Questions

1 Answered Questions

[SOLVED] Constraint for a unique column if other column has same value