SQL Index Analyzer: A Practical Guide
Learn how to analyze your SQL schema for missing indexes, unindexed foreign keys, and duplicate indexes. Step-by-step guide with real examples.
Weekly updates on database migrations, schema design best practices, and the journey of building SchemaLens.
Learn how to analyze your SQL schema for missing indexes, unindexed foreign keys, and duplicate indexes. Step-by-step guide with real examples.
Side-by-side comparison of Oracle and PostgreSQL schema migration syntax. Type mappings, ALTER TABLE differences, identity columns, and quoting rules.
Five rules for designing schemas that grow from thousands to billions of rows. Covers normalization, primary keys, indexing, type selection, and partitioning.
A 20-step checklist for migrating data from CSV spreadsheets to PostgreSQL, MySQL, or SQLite. Covers data cleaning, schema design, bulk import, and validation.
A practical framework for choosing between SQLite and PostgreSQL. Five questions to ask before migrating, plus a safe migration path when you outgrow SQLite.
A step-by-step guide to migrating MySQL databases to PostgreSQL safely. Schema conversion, data export, type mapping, and common pitfalls to avoid.
Learn how to compare Oracle schemas, generate ALTER TABLE scripts, and avoid production incidents. Covers DBMS_METADATA, identity columns, and Oracle-specific pitfalls.
10 essential practices for versioning, testing, and deploying schema changes safely. Treat your database structure like application code.
A comprehensive survey of the schema migration landscape. Trends, tools, pain points, and 5 predictions for where the industry is heading.
Learn how to automate schema reviews using webhooks, REST APIs, and CI/CD. Get Slack alerts for breaking changes and post diffs to PR comments.
11 essential rules every production CREATE TABLE statement should follow. Design schemas that scale, stay safe, and perform well from day one.
Schema changes are the riskiest code you ship. Learn how to build a review process that prevents incidents without slowing your team down.
Adding a column without an index can lock tables for hours. Learn when to index during migrations and the 5 indexes every migration needs.
Generate beautiful database documentation from CREATE TABLE statements instantly. Export to Markdown or HTML. No signup required.
Add automated schema diffing to your CI/CD pipeline. Catch dangerous database changes in pull requests before they reach production.
Practical SQL formatting rules with before/after examples. Make your database code readable in pull requests and catch mistakes faster.
Validate SQL, format queries, and generate schema docs — all in your browser. A tour of the SchemaLens free tool suite.
Generate beautiful HTML documentation from your CREATE TABLE statements. Export to Markdown or HTML. Supports all major SQL dialects.
Why generating SQL from CSV beats direct imports. Auto type detection, dialect-correct output, and complete privacy.
Turn JSON payloads into CREATE TABLE statements instantly. Auto-detects types, handles nested objects, supports all major SQL dialects.
Convert CSV files to CREATE TABLE and INSERT statements. Auto-detects column types and delimiters. Supports all major SQL dialects.
Convert JSON objects to CREATE TABLE statements. Handles nested objects, arrays, and auto-detects column types for all major SQL dialects.
Build CREATE TABLE statements visually. Add columns, set types, and choose constraints. Generate SQL for PostgreSQL, MySQL, SQLite, and SQL Server.
Lint your schema for missing primary keys, unindexed foreign keys, missing timestamps, and other database design issues. Score 0-100.
Find missing indexes, unindexed foreign keys, duplicate indexes, and query-specific index gaps. Get instant CREATE INDEX recommendations.
Stop memorizing DDL syntax. Build CREATE TABLE statements with a visual form and generate correct SQL for any major dialect instantly.
Stop writing ALTER TABLE by hand. Learn how to automatically generate migration SQL from schema diffs for PostgreSQL, MySQL, SQL Server, and SQLite.
Dropped columns, missing indexes, type truncation — the schema changes that cause the most production incidents and how to prevent them.
Manual migration scripts cost more than developer time. They cost sleep, trust, and velocity. Here's the real price—and how to fix it.
A step-by-step guide to catching schema drift between staging and production. Why semantic diffs beat text diffs every time.
The subtle differences in ALTER TABLE syntax that break migrations when switching dialects. A reference for multi-database teams.
SQL Server ALTER TABLE syntax, IDENTITY columns, bracket quoting, named constraints, and how to diff MSSQL schemas safely.
How we turned a Node.js SQL parser into a client-side engine for schema diff. No backend required.
A comprehensive checklist for reviewing database migrations. Catch dangerous changes before they break production.
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