SQL Server Audit is a built-in logging feature in Microsoft SQL Server that records important server and database actions, such as logins, permission changes, data access, and configuration updates. The logs can be written to files or the Windows event system, giving defenders a durable record of who did what, when, and from where.
In cyber security, auditing matters because many attacks rely on privileged misuse or quiet data access rather than obvious malware. SQL Server Audit helps detect suspicious queries, unexpected role changes, and attempts to use features as an egress path for data theft or covert command traffic. Used well, it supports incident investigation, compliance, and alerting. Used poorly, with weak permissions or incomplete coverage, it may miss the very actions an attacker wants to hide.