DbSchema Blog

Categories

• Cassandra
• Databases
• Dbschema features
• Design
• Firebird
• Migrations
• Mongodb
• Mysql
• Oracle
• Postgresql
• Release notes
• Snowflake
• Sql server
• Sqlite
• Tool comparisons
• Tools
• Tutorials

SQL EXISTS Operator Explained with Practical Examples | DbSchema

Learn how SQL EXISTS and NOT EXISTS work with subqueries, real examples, common mistakes, and practical query patterns.

Tutorials • 05-Sep-2026

SQL CASE Expression Explained with Practical Examples

What the SQL CASE expression is, simple vs searched syntax, and examples in SELECT, ORDER BY, GROUP BY, UPDATE, INSERT, DELETE, and aggregate queries.

Tutorials • 05-Sep-2026

SQL Aggregate Functions: COUNT, SUM, AVG, MIN, MAX, and GROUP BY | DbSchema

Learn SQL aggregate functions with COUNT, SUM, AVG, MIN, MAX, GROUP BY, HAVING, and ROLLUP examples. Build reporting queries faster in DbSchema.

Tutorials • 05-Sep-2026

SQL Tutorial for Beginners with Real Examples | DbSchema

Learn SQL basics and database fundamentals with real-world examples, core concepts, and practical next steps.

Tutorials • 05-Sep-2026

SQL IN Operator Explained with Practical Examples | DbSchema

Learn how SQL IN and NOT IN work with practical examples, subqueries, common mistakes, and safe filtering patterns.

Tutorials • 05-Sep-2026

SQL LIKE Operator: Wildcards, ESCAPE, ILIKE, and Examples | DbSchema

Master the SQL LIKE operator with wildcards, NOT LIKE, ESCAPE, ILIKE, examples, and performance tips. Build pattern searches visually in DbSchema.

Tutorials • 05-Sep-2026

SQL INSERT INTO Statement Explained with Examples | DbSchema

Learn SQL INSERT INTO syntax with single-row, multi-row, default values, and INSERT...SELECT examples, plus common mistakes.

Tutorials • 05-Sep-2026

SQL UNION Operator: UNION vs UNION ALL with Examples | DbSchema

Learn SQL UNION and UNION ALL with syntax, duplicate rules, ORDER BY tips, comparisons, and FAQs. Build combined result queries faster in DbSchema.

Tutorials • 05-Sep-2026

SQL Syntax Explained with Core Commands and Examples

How SQL statements are structured, a runnable example per command family, where engine syntax differs, and how to read a syntax error.

Tutorials • 05-Sep-2026

SQL SELECT Statement: Syntax, Examples, and Query Order | DbSchema

Learn the SQL SELECT statement with syntax, WHERE, DISTINCT, JOINs, GROUP BY, ORDER BY, subqueries, and FAQs. Build queries visually in DbSchema.

Tutorials • 05-Sep-2026