The difference between a composite key, a foreign key and a primary key is a good illustration of the complex nature of relational database standards.

SADeprecationWarning: A column with name 'group_id' is already present in table 'product_mcve'. Please use method :meth:`_schema.Table.append_column` with the parameter ``replace_existing=True`` to ...

We have a table in Sql Server with 77 columns. When we save a lot of entities in this table with Entity Framework 7 then EF7 is generating multiple batched Merge sql-statements. When we add a new ...

In a SQL Server, two types of indexes exist; Clustered and non-clustered indexes. Both clustered indexes and non-clustered indexes have the same physical structure. Moreover, both of them are stored ...

For everyone normalizing their designs, just remember: There ain't no such thing as a partial foreign key. When a project pretends that partial foreign keys are a valid concept, the end result is a ...

Designing an appropriate set of indexes can be one of the more troubling aspects of developing efficient relational database applications. Perhaps, the most important thing you can do to assure ...