Category
Technologies
SQL Tutorials
Keep up to date with the latest techniques and resources for SQL Server. Our tutorials are full of free SQL Server training tips to help you learn, build, & grow.
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SQL Data Types: Essential Guide for Beginners
Master SQL data types in MySQL, PostgreSQL & SQL Server. Learn to choose the right numeric, text, and date formats to optimize performance and data integrity.
Amberle McKee
January 19, 2026
SQL ON DELETE RESTRICT: Prevent Accidental Data Loss
Understand how SQL ON DELETE RESTRICT protects data integrity. Learn how it blocks unsafe deletes and when to choose it over CASCADE or SET NULL rules.
Allan Ouko
January 16, 2026
SQL ON DELETE CASCADE: Automatically Remove Dependent Data
Understand how SQL ON DELETE CASCADE automates dependent deletes in SQL, keeps tables consistent, and helps prevent accidental data loss.
Allan Ouko
January 16, 2026
SQL DELETE: How to Remove Data Safely
Understand how to use SQL DELETE to remove records in a table. Learn the key syntax, safety workflows, and optimization techniques for handling large datasets.
Allan Ouko
January 12, 2026
SQL Foreign Key: Keep Your Database Relationships in Check
Find out how foreign keys tie tables together, stop invalid data from slipping in, and help your database stay consistent.
Allan Ouko
December 3, 2025
CREATE TABLE in SQL: Master Schema Design and Best Practices
Understand how CREATE TABLE shapes your database. Learn the key syntax, data types, constraints, and optimization techniques for building scalable schemas.
Allan Ouko
December 1, 2025
SQL GROUP BY Multiple Column: Tips and Best Practices
Learn how to group data by multiple columns in SQL to perform advanced aggregations. Explore use cases, performance tips, and practical examples.
Allan Ouko
September 7, 2025
SQL GROUP BY Multiple Column: Tips and Best Practices
Learn how to group data by multiple columns in SQL to perform advanced aggregations. Explore use cases and performance tips.
Allan Ouko
August 18, 2025
SQL Primary Key: A Comprehensive Technical Tutorial
Understand what an SQL primary key is and its function in database relationships and query performance in this technical tutorial.
Austin Chia
August 7, 2025
Difference Between SQL and PL/SQL: When to Use Each
Understand the key differences between SQL and PL/SQL, their ideal use cases, and practical tips for choosing the right tool for efficient database development.
Allan Ouko
August 6, 2025
Normalization in DBMS: A Complete Guide with SQL Examples
This guide covers the complete normalization process from basic concepts to advanced normal forms with practical examples.
Dario Radečić
July 14, 2025
Dynamic SQL: Techniques, Security, and Optimization
See how dynamic SQL enables runtime query execution with flexible logic. Explore execution methods, security and performance tips, and practical use cases.
Allan Ouko
June 4, 2025