SQL Database Development Certified Professional SC-SQLDDCP

SQL Database Development Certified Professional

Certification Code: SC-SQLDDCP

The SQL Database Development Certified Professional(SC-SQLDDCP) certification validates a broad and in-depth set of competencies required for designing, developing, and managing SQL Server database solutions. This credential is aimed at professionals responsible for building robust, secure, and efficient data-driven applications within Microsoft SQL Server environments.

1. Database Design and Modeling

• Designing relational data models and defining normalized database schemas.
• Creating tables, defining relationships, and enforcing referential integrity through primary keys and foreign keys.
• Applying constraints such as NOT NULL , UNIQUE , CHECK , and DEFAULT to ensure data integrity.
• Selecting appropriate native and domain-specific SQL Server data types.
• Applying normalization and denormalization techniques as needed for performance and flexibility.

2. Transact-SQL (T-SQL) Programming

• Writing basic to advanced SQL queries using SELECT , JOIN , WHERE , GROUP BY , HAVING , and ORDER BY .
• Implementing correlated and non-correlated subqueries.
• Using Common Table Expressions (CTEs) for recursive and modular query construction.
• Applying aggregate and window functions like OVER , PARTITION BY , RANK , and ROW_NUMBER .
• Declaring variables and using flow control constructs ( IF , CASE , WHILE , BEGIN...END ).
• Handling exceptions using the TRY...CATCH block.

3. Database Object Development

• Creating and modifying stored procedures using CREATE PROCEDURE and ALTER PROCEDURE .
• Defining input, output, and default parameters for procedural logic.
• Calling procedures using EXEC or EXECUTE in automation workflows.
• Encapsulating business logic into reusable and modular procedures.
• Creating user-defined functions (UDFs), both scalar and table-valued.
• Building simple and complex views, including those with WITH SCHEMABINDING .
• Implementing synonyms, sequences, and unique identifiers for flexible schema referencing.

4. Triggers

• Creating AFTER and INSTEAD OF triggers for INSERT , UPDATE , and DELETE operations.
• Using triggers for auditing, enforcing business rules, and data validation.
• Addressing performance concerns and preventing infinite recursion in trigger logic.

5. Transactions and Concurrency Control

• Managing transactions using BEGIN TRANSACTION , COMMIT , and ROLLBACK .
• Implementing error handling within transactional logic.
• Understanding and applying isolation levels( READ COMMITTED , REPEATABLE READ , SERIALIZABLE , etc.).
• Mitigating locking, blocking, and deadlocks through strategic query and transaction design.

6. Query Optimization and Performance

• Strategically using indexes for query performance improvement.
• Reading and interpreting actual and estimated execution plans.
• Identifying and resolving performance bottlenecks via query refactoring and statistics updates.
• Managing index fragmentation and maintaining query execution statistics.

7. Security and Access Control

• Granting, revoking, and denying permissions at object, schema, and database levels using GRANT , REVOKE , and DENY .
• Applying role-based access control (RBAC) and enforcing least privilege principles.
• Implementing Row-Level Security (RLS) and Dynamic Data Masking for data protection.
• Understanding foundational data encryption techniques in SQL Server environments.

8. Automation and Maintenance

• Automating routine tasks using SQL Server Agent(Jobs, Steps, and Schedules).
• Creating reusable T-SQL scripts for day-to-day development and administrative tasks.
• Monitoring system activity with system views( sys.* ) and procedures like sp_who , sp_help .
• Performing basic backup and restore operations in development and testing environments.

This certification affirms the holder's ability to develop high-quality, secure, and efficient database applications in SQL Server using advanced T-SQL programming, schema design, and performance tuning techniques.