Schema Migration | Schema & Query Generator
Translate DDL schemas and migration queries effortlessly across database engines.
dbNexus handles automatic data type mapping, constraint rewriting, and dialect syntax translation
with zero data loss—100% locally in your browser.
Designed for Fast, Error-Free Schema Translation
Every control in the dbNexus Migration Workbench is engineered to turn complex dialect translation into a clean, predictable 3-click workflow.
Zero-Loss AST Schema Synthesis
When you click Generate Migration, dbNexus compiles the source DDL into a universal Abstract Syntax Tree (AST), reorders tables by dependency, and writes target-native DDL.
departments) are generated before child tables (employees) to prevent foreign key errors.DECIMAL(10,2) ➔ NUMERIC(10,2) and AUTO_INCREMENT ➔ SERIAL.CREATE TABLE IF NOT EXISTS statements to avoid crashing live pipelines.How dbNexus Translates SQL Syntax
See the exact syntactic transformations made by the schema generator across dialects.
Data Type Translation
Mapping proprietary dialect column representations into idiomatic target types without data truncation or precision loss.
salary DECIMAL(10,2),
is_active TINYINT(1) DEFAULT 1,
bio MEDIUMTEXT,
registered_at DATETIME(6)salary NUMERIC(10,2),
is_active BOOLEAN DEFAULT TRUE,
bio TEXT,
registered_at TIMESTAMPTZFrom Source DDL to Target Migration in 4 Steps
An automated, client-side translation pipeline that guarantees zero downtime and valid syntax.
Input Source Schema
Paste DDL directly or click Upload SQL File to load complete schema dumps.
AST Dialect Parsing
The parser analyzes tables, types, foreign keys, and indexes into a universal schema tree.
Type & Dependency Mapping
Topologically orders tables and translates types and sequences into target dialect syntax.
Export Target DDL
Click Copy or Download to deploy clean .sql to your production database.
Built for Mission-Critical Production Migrations
Eliminate migration anxiety with browser-isolated execution and strict syntactic verification.
100% Client-Side Privacy
Zero schema data ever leaves your computer. All parsing, transformation, and query generation execute entirely in local browser memory.
- In-Memory WebAssembly & JS
- Zero Telemetry on Sensitive Schema
- Air-Gapped / Offline Capable
Topological Table Ordering
Foreign key hierarchies are analyzed so parent tables are generated first, preventing unresolved reference and dependency errors.
- Parent-First DDL Sequence
- Circular Dependency Guards
- Clean Cascade Constraints
Idempotent Execution
Generates CREATE TABLE IF NOT EXISTS statements with deterministic constraint naming to guarantee safe rollouts and safe reruns.
- IF NOT EXISTS Safeguards
- Named FK & Unique Constraints
- Rollback-Safe Scripts
Tooling & CLI Agnostic
Exported .sql files are pure ANSI-compliant scripts that work natively with modern migration runners, IDEs, and CLI tools.
- Flyway & Liquibase Ready
- Native CLI (psql, mysql, sqlcmd)
- Supabase, Prisma & DBeaver
Cross-Engine Migration Supported For
Translate schema structures, data types, and foreign key constraints across leading database engines.
