Aplication and Practice of Data Authorization and Access Technology in Multi-tenant Environment

With the rapid development of cloud computing technology, multi-tenant applications in the Software as a Service (SaaS) model have become an industry standard. Multi-tenant technology brings numerous advantages, such as resource sharing, cost reduction, and efficiency improvement, but also poses data isolation and security challenges. This paper explores data authorization and access technologies in multi-tenant environments, employing SQL dynamic substitution strategies to ensure fine-grained data authorization control in a multi-tenant environment. This allows a single system codebase to switch freely between tenants with the same database structure without modifying the SQL. Furthermore, through unified registration and management of databases, the solution meets the requirements for database security, integrity, and privacy protection.