It’s often useful to create indexes for foreign key fields and for fields that appear in WHERE ... MySQL, Oracle Database, SQL Server, SQLite, and IBM DB2. W3Schools. SQL Tutorial. Free and ...

By using cascading referential integrity constraints, you can define the actions that SQL Server 2005 takes when a user tries to delete or update a key to which existing foreign keys point. Skip ...

I'm adding a table and subclass table to my DB. (Subclass table = table where the primary key joins to the primary key of another table, to give extra row ...

Retaining an infinitude of Foreign Keys may cause future performance bottlenecks as transactional volume will get a performance hit by ... SQL Server Everywhere: Platform Choices Enrich Data-Driven ...

Some database designers may feel that it’s OK to arbitrarily assign all dimensional foreign keys as part of a fact’s primary key even when one or more do not actually contribute to the fact table’s ...