Cardinality in data modeling defines how many instances of one entity can relate to instances of another, such as one-to-many or many-to-many.
A clustered index stores table rows physically ordered by the index key, so the index leaf level holds the data itself and…
Column-level encryption protects selected database columns, such as identity or card numbers, by storing them as ciphertext under separately managed keys.
A commit is the operation that ends a database transaction and makes all of its changes permanent and visible to other sessions…
A composite index is a database index built on two or more columns in a fixed order, speeding queries that filter or…
Connection pooling keeps a set of open database connections ready for reuse, cutting connection setup cost and capping the load clients place…
A covering index is a database index that contains every column a query needs, so the query is answered from the index…
A CTE (common table expression) in SQL is a named temporary result set defined with WITH and used by a single query,…