Comprehensive Guide to SQL Converter
Welcome to the W3D Network SQL Converter. This tool bridges the gap between your database schema and your application code. By instantly converting SQL CREATE TABLE statements into data models (like Pydantic or TypeScript), it saves hours of boilerplate coding.
1. What Does This Tool Do?
Modern application development often requires keeping your database schema in sync with your codebase. Manually writing Pydantic models (for Python/FastAPI) or Interfaces (for TypeScript/React) that match your SQL tables is tedious and error-prone.
This tool automates that process. You paste the SQL, and it generates the type-safe code you need.
2. Supported Conversions
- SQL → Pydantic (Python): Generates `pydantic.BaseModel` classes with appropriate type hints (`int`, `str`, `bool`, `Optional[...]`). Perfect for FastAPI backends.
- SQL → TypeScript: Generates `interface` definitions with mapping to TS types (`number`, `string`, `boolean`). Ideal for frontend applications consuming your API.
3. Data Privacy & Security
Database schemas often reveal sensitive information about your architecture.
- Client-Side Processing: The parsing logic runs entirely in your browser using JavaScript. Your SQL statements are never sent to our servers.
- Zero Trace: Once you close the tab, the converted code is gone (unless you copied it). We do not store or log your schemas.
4. Handling Constraints
The tool intelligently maps SQL constraints to code:
- NULLABLE: Columns defined as `NOT NULL` become required fields. Columns without it (or with `DEFAULT NULL`) become optional.
- DEFAULT Values: Default values in SQL (like `DEFAULT true`) are preserved in Pydantic models where possible.
5. Best Practices
- Use Valid SQL: Ensure your `CREATE TABLE` syntax is standard. While the parser is robust, it works best with standard PostgreSQL or MySQL syntax.
- Review Types: SQL types can be complex (e.g., `VARCHAR(255)`, `TEXT`, `JSONB`). Always double-check that the generated types (e.g., `str`, `Any`) match your specific business logic needs.