The significance of SQL in database management lies in its role as the standard language for querying and manipulating relational databases. SQL (Structured Query Language) enables users to perform tasks such as creating, updating, and deleting database records, as well as retrieving specific data through complex queries. Its declarative nature allows users to describe the desired outcome without having to specify how to achieve it. SQL's widespread adoption ensures compatibility, making it essential for data management across various applications and industries.