🗄️ Database ✅ 100% Free ⚡ Live Preview

Table Schema Generator

Design your database tables visually. Add columns, pick data types, set constraints — then export clean SQL CREATE TABLE statements or JSON schemas instantly.

🗄️ Table Settings

SQL Dialect

MySQL

PostgreSQL

SQLite

SQL Server

Table Name

Schema / Database

Comment (optional)

Engine

Charset

📋 Columns 0

⚡ Quick Insert

📦 Sample Schemas

⚙️ Output Options

IF NOT EXISTS

Include comments

Uppercase keywords

Include sample data (INSERT)

👁 Live Schema Preview

Add columns to see the schema preview ↑

SQL CREATE TABLE

JSON Schema

Laravel Migration

Prisma Schema

📋 SQL — CREATE TABLE

What Is the Table Schema Generator?

The DevToolbox Table Schema Generator is a visual database design tool that lets you build SQL table schemas without writing code from scratch. Add columns, choose data types, set constraints like PRIMARY KEY, NOT NULL, and UNIQUE, then export production-ready SQL, JSON Schema, Laravel migrations, or Prisma schema definitions.

It supports four major SQL dialects: MySQL, PostgreSQL, SQLite, and SQL Server — each with the correct syntax and type names automatically applied.

Supported Column Constraints

PRIMARY KEY (PK) — uniquely identifies each row. Auto-enables NOT NULL.
NOT NULL (NN) — the column must have a value; NULL is rejected.
UNIQUE (UQ) — every value in the column must be distinct across all rows.
AUTO INCREMENT (AI) — database automatically assigns the next integer value (MySQL/SQLite) or use SERIAL/IDENTITY in other dialects.
INDEX (IDX) — creates a secondary index on the column to speed up lookups and JOINs.
DEFAULT — a fallback value used when no value is provided on INSERT.

Frequently Asked Questions

VARCHAR(n) stores variable-length strings up to n characters and is indexed efficiently. TEXT stores unlimited-length strings but cannot always be fully indexed or used in certain constraints. Use VARCHAR for names, emails, slugs, and short fields; use TEXT for descriptions, body content, or anything potentially long.

Use INT (max ~2.1 billion) for most tables. Use BIGINT (max ~9.2 quintillion) for high-volume tables like events, logs, or any table expected to grow beyond 2 billion rows. When in doubt, BIGINT is the safer long-term choice.

UUIDs are globally unique across systems — ideal when merging data from multiple databases, distributing across microservices, or when you don't want sequential IDs to be guessable. The tradeoff is storage size (16 bytes vs 4–8 bytes) and slightly slower index performance on very large tables.

InnoDB is MySQL's default storage engine and supports ACID transactions, foreign keys, and row-level locking. MyISAM is older, faster for read-heavy workloads but lacks transactions and foreign key support. Always use InnoDB for modern applications unless you have a specific reason not to.

Soft delete means adding a deleted_at timestamp column instead of actually removing rows. When "deleted", you set the timestamp. Queries then filter WHERE deleted_at IS NULL. This preserves data history, allows undo/restore, and maintains referential integrity. Laravel's Eloquent ORM handles this pattern automatically.