DbVisualizer articles - 250 total
Essential SQL Commands for Developers (With Code Samples)
SQL lets you control and query relational databases with precision. This guide shares the key...
Understanding SUBSTRING_INDEX in SQL: Real Use Cases
SQL developers often need to slice up strings—whether to extract domains from emails, parse IPs, or...
A Developer’s Guide to SQL NOT IN: Smarter Queries, Faster Results
The NOT IN clause in SQL is useful for filtering out unwanted data. But it comes with caveats—mainly...
SQL Add to Date: Simple Guide for MySQL, PostgreSQL, SQL Server & Oracle
Whether you’re calculating deadlines, setting expiration dates, or building event logic, SQL’s...
Learn SQL’s CAST Function for Clean Type Conversion
Data types matter in SQL. Whether you’re comparing values or formatting results, type mismatches can...
PostgreSQL Upsert: INSERT ON CONFLICT Explained
Inserting a record only if it doesn't already exist—or updating it if it does—is a common pattern in...
Make Your SQL Cleaner with Common Table Expressions (CTEs)
When SQL queries get long and convoluted, it’s easy to lose track of logic. CTEs (Common Table...
Enhancing SQL INSERT INTO Performance: Tips and Tools
The SQL INSERT INTO statement is a core part of almost every application—but are you using it...
Why Data Visualization Tools Matter for Developers, Managers, and Analysts
In tech and business, data is everywhere—but it’s useless if people can’t understand it....
Postgres TEXT vs VARCHAR: When to Use Which
Not sure whether to use TEXT or VARCHAR in PostgreSQL? You’re not alone. Both types store string...
ALTER TABLE ADD COLUMN in SQL: Syntax, Tips & Tools
Changing your schema is part of everyday development, and ALTER TABLE ADD COLUMN is the go-to command...
Schemas in PostgreSQL: A Practical Guide for Developers
Schemas in PostgreSQL aren’t just for large systems—they’re for anyone who wants to keep their data...
Database Schema Design: How to Structure Your App’s Data Effectively
Schema design is often overlooked until things break — slow queries, data duplication, or invalid...
Clean SQL with Comments: Syntax and Practices for All Engines
Writing clean SQL is about more than just correctness—it's about clarity. SQL comments help you...
How to Start with Database Migrations
If you're adjusting your schema or moving platforms, you're doing database migration. Whether small...
Efficient String Splitting in PostgreSQL: 5 Essential Functions
Splitting strings is crucial for effective text management in PostgreSQL. PostgreSQL offers built-in...
PostgreSQL CASE: Conditional Logic for Powerful SQL Queries
PostgreSQL’s CASE statement allows you to add conditional logic to SQL queries, helping developers...
PostgreSQL CASE: Build Smarter Queries with Conditional Logic
Need to write flexible SQL queries in PostgreSQL? Use the CASE statement to return different results...
Outer Joins in SQL: The Key to Keeping Unmatched Rows
SQL outer joins help you retrieve all rows from one or both tables—even if there's no match. This...
SQL DDL Commands Explained: Structuring Your Database
Every database needs structure, and SQL DDL is the set of commands that provides it. From defining...
How to Use SQL Views to Simplify Data Access and Reporting
When working with multiple tables, SQL views provide a way to combine and present data in a clean,...
Three practical ways to create a database in MySQL
If you need to spin up a new MySQL database, there are three straightforward ways to do it. This...
Essential PostgreSQL Data Types Explained
PostgreSQL offers a robust set of data types vital for storing and manipulating data effectively....
Handling Big Data in SQL Databases – Pitfalls to Avoid
Scaling SQL databases to handle big data isn’t just about storage—it’s about performance. Slow...
SQL Temporary Tables: A Quick and Practical Guide
Temporary tables in SQL help manage large queries efficiently. They are session-specific and get...
pg_dump PostgreSQL Backups: A Quick and Practical Guide
Ensuring a reliable backup of your PostgreSQL database is a crucial part of database management. The...
SQL DATEDIFF Explained: Syntax and Database Differences
Handling date differences is crucial in SQL, and DATEDIFF is the go-to function. However, its syntax...
PostgreSQL Data Types: An Essential Guide
Data types define how PostgreSQL stores and processes information. Selecting the right data type...
Mastering SQL Server CONTAINS for Advanced Text Search
Finding relevant text data efficiently requires full-text search capabilities. SQL Server’s CONTAINS...
SUBSTRING_INDEX in MySQL: A Simple Guide to String Extraction
Extracting substrings from text is a common task in SQL. MySQL provides SUBSTRING_INDEX, a function...