In a Database Management System (DBMS), a "subtract layer" is not a standard term, but it could refer to a layer or operation where data is filtered or excluded based on certain conditions. If you are referring to a layer or operation that involves subtracting or filtering data, here are some relevant tags that could be associated with it: br br 1. **Data Filtering** br 2. **Set Operations** br 3. **SQL Queries** br 4. **Data Exclusion** br 5. **Difference Operation** br 6. **Query Optimization** br 7. **Relational Algebra** br 8. **Data Manipulation** br 9. **Database Operations** br 10. **Data Subtraction** br 11. **Conditional Filtering** br 12. **Data Transformation** br 13. **Database Layers** br 14. **Data Integrity** br 15. **Query Execution** br br If you are referring to a specific context or implementation of a "subtract layer," please provide more details so I can tailor the tags more accurately.