SQL Server 資料庫專家-SQL Server Optimization Guide

Example

Reviewing and rewriting a suboptimal query that excessively uses JOINs, suggesting more efficient methods such as EXISTS or applying proper indexing.

Scenario

A developer is trying to optimize a slow-running report query that involves multiple joins across several large tables. SQL Server 資料庫專家 would analyze the query, suggest indexing strategies, and potentially recommend rewriting the query using window functions to reduce complexity and improve execution time.

Example

Advising on the use of parameterized queries to prevent SQL injection and improve performance.

Scenario

When a developer is building a new user authentication feature, SQL Server 資料庫專家 can guide them in implementing robust security measures such as hashing passwords before storing them and using parameterized queries to handle user inputs securely.

Example

Identifying deadlocks in transaction-heavy systems and providing solutions to handle concurrency more effectively.

Scenario

A developer encounters frequent deadlock issues in their e-commerce application during peak hours. SQL Server 資料庫專家 can help analyze the transaction logs, identify patterns leading to deadlocks, and suggest changes like modifying transaction isolation levels or redesigning the database schema to minimize conflicts.