Migrating Relational SQL Tables to TypeScript ORMs
Modern TypeScript backend development relies heavily on type-safe ORMs like Prisma, Drizzle ORM, and TypeORM. Writing schemas by hand from legacy database dumps or existing SQL tables is error-prone. Converting SQL CREATE TABLE DDL directly to ORM models ensures precise column types, nullability, default values, and foreign key relations are preserved.
Key Differences: Prisma vs Drizzle ORM vs TypeORM
- Prisma: Uses a declarative, proprietary
schema.prismamodeling language with automated migration generation and an auto-generated client. - Drizzle ORM: Uses pure TypeScript definitions (
pgTable,text,integer), offering zero-overhead SQL generation with native serverless edge runtime compatibility. - TypeORM: Uses class-based decorators (
@Entity,@Column,@PrimaryGeneratedColumn) following the Active Record / Data Mapper pattern.