SQL stands for Structured Query Language, which is a standardized programming language used to manage and manipulate relational databases. It allows for querying, inserting, updating, and deleting data in a database.
- System Query Language (A) is incorrect as SQL refers to Structured Query Language, not system-specific queries.
- Sequential Query Logic (C) is not related to SQL, as it does not define the core functionality of SQL.
- Standard Query Layer (D) is also incorrect, as SQL is specifically about querying databases, not a "query layer."
Therefore, the correct answer is (B), Structured Query Language.