TECHMIXING DATABASE KNOWLEDGE HUB
Learn. Troubleshoot. Build Better Data Systems.
A curated learning path for database professionals — from SQL Server administration and performance tuning to Azure SQL, security, Power BI, AI and career development. Start with a cornerstone guide, then go deeper with focused supporting articles.
5Major learning pillars
25+Core cornerstone guides
100+Supporting resources
PracticalScripts, scenarios & real-world guidance
TechMixing Database Knowledge Hub
Your central starting point for practical database knowledge. Begin with a Cornerstone guide for the complete picture, then explore the Supporting Articles for focused, deeper learning.
Simple navigation
Blue = Cornerstone → main guide for the topic.
Green = Supporting → focused article linked to the main guide.
Explore the Knowledge Map
Organized by topic so readers can move naturally from fundamentals to advanced practice.
1. SQL Server Performance & Troubleshooting
Core TechMixing pillar
CORNERSTONE
SQL Server Performance Tuning: 10 Proven Techniques to Speed Up Your Queries
Supporting articles
- Top SQL Performance Tuning Techniques Every DBA Should Know
- Optimizing Query Performance: A Complete Guide for SQL Developers and DBAs
- SQL Server Logical Reads: Why They Matter More Than Query Time
- Top 10 SQL Server Wait Types Explained & Fixed
- SQL Server Wait Types Cheat Sheet for Performance Tuning
- SQL Deadlocks: Causes, Prevention, and Best Practices
- How to Approach Performance Tuning of a Complex SQL Query
CORNERSTONE
SQL Server Execution Plan Complete Guide: Read Plans, Spot Bottlenecks, and Actually Fix Slow Queries
Supporting articles
- SQL Server Execution Plans Explained: A Beginner’s Guide for DBAs and Developers
- Understanding Estimated and Actual Query Plans in SQL Server
- Difference Between Actual & Estimated Execution Plan
- Execution Plan Analysis: CTEs vs Temp Tables vs Derived Tables
- Parameter Sniffing in SQL Server
- What is Parameter Sensitive Plan Optimization (PSPO)?
CORNERSTONE
SQL Server Performance Troubleshooting with Query Store, DMVs & Extended Events
Supporting articles
- Using Query Store to Identify Expensive Queries in Azure SQL Database
- Why Your SQL Server Queries Slow Down Over Time (And How Query Store Can Help)
- Extended Events (XEvents) in SQL Server & Azure SQL: Complete Guide
- What are DMVs in SQL Server and how to use them?
- 10 Essential SQL Server Scripts Every DBA Must Have for Performance Troubleshooting
2. Azure SQL
Architecture, performance, monitoring, HA/DR & migration
CORNERSTONE
Top 30 Azure SQL DMVs Every DBA Should Know (With Scripts, Permissions & Real-World Examples)
Supporting articles
3. SQL Server DBA & Administration
Daily operations, health checks, errors & administration
CORNERSTONE
The Complete SQL Server DBA Morning Health Check Guide: 25 Daily Checks Every DBA Should Perform
Supporting articles
- Review SQL Server Error Logs Daily
- 5 SQL Server Agent Job Failures Every DBA Should Investigate Immediately
- SQL Script to Find the List of All Jobs Failed Yesterday
- SQL Script to Find Database and File Details
- SQL Script to Find Database Size
- SQL Script to Find the Last Access Date of a Database
- Script to Find All Running Queries/Jobs
CORNERSTONE
Top 100 SQL Server Administration (DBA) Interview Questions & Answers
Supporting articles
4. Database & Azure Security
Authentication, authorization, encryption & least privilege
CORNERSTONE
Azure Authentication & Authorization: SQL Auth, Microsoft Entra ID, Managed Identity, and RBAC Explained
Supporting articles
CORNERSTONE
Azure Cloud Data Security: Multi-Layered Protection Explained (IAM, Encryption, and Compliance)
Supporting articles
- Top 50 Azure SQL Data Security Interview Questions and Answers
- Always Encrypted in Azure: Protecting Data From the People Who Manage It
- Securing Data in SQL Server
- SQL Server Security Best Practices: From Logins to Encryption
- What is SQL Injection and How to Prevent It?
- Understanding of GDPR & HIPAA
5. Data, Power BI, AI & Professional Development
Broader data professional learning paths
CORNERSTONE
AI for SQL Server DBAs: Practical Ways to Save Hours Every Week
Supporting articles
- AI-Powered Query Optimization in SQL Server: How Intelligent Query Processing (IQP) Works
- Introduction to AI Agents: Architecture, Types, and How They’re Shaping the Future of AI
- Agentic AI: Architecture, Use Cases, Benefits, and Ethical Challenges
- Comprehensive Guide to Prompt Engineering
- The Ultimate Guide to AI Tools for Coding & Development
CORNERSTONE
Top 100 Database Analyst Interview Questions and Answers
Supporting articles
- Top 100 Database Architect Interview Questions and Answers
- Top 100 SQL Server Interview Questions and Answers
- Azure SQL Interview Questions and Answers
- Top 100 DP-300 Scenario-Based Interview Questions and Answers
- Top 100 SQL Server Administration (DBA) Interview Questions & Answers
- Top 100 Power BI Interview Questions and Answers
CAREER + AI
Career Growth & AI for Database Professionals
Technical skills get you into the room. The ability to communicate, build your professional brand, and use AI effectively can help you move forward.
Build a stronger professional presence
Learn how to position your database experience, improve your LinkedIn profile, communicate your expertise, and prepare for career opportunities.
- LinkedIn profile optimization
- Personal technical brand building
- Interview & scenario preparation
Use AI as a force multiplier
Explore practical ways AI can help DBAs and data professionals with troubleshooting, documentation, query analysis, automation, learning and productivity.
- AI-assisted database troubleshooting
- Prompting & productivity techniques
- Agentic AI and database use cases