Default Database Primary, Foreign, and Unique Key Indexing
Introduction In this article, we are going to see what is the default database Primary, Foreign, and Unique Key indexing strategy when using Oracle, SQL Server, PostgreSQL, and MySQL. So, if you are wondering whether one of those top relational databases creates a default index whenever you are adding a Primary Key, Foreign Key, or Unique Key constraint, then this article is going to provide you with the answer you’ve been waiting for.
SQL Server Foreign Key Locking
Introduction In this article, we are going to see how SQL Server Foreign Key constraints are locking the parent record when executing a child record UPDATE. This situation is specific to SQL Server and happens even when using the Read Committed Snapshot Isolation level.
