JSON to SQL
Generate CREATE TABLE and INSERT statements from a JSON array. Choose your SQL dialect.
What is JSON to SQL Conversion?
JSON to SQL conversion generates the SQL statements needed to store JSON array data in a relational database. The tool reads the structure of your JSON objects, creates a CREATE TABLE statement with appropriate column types, and generates one INSERT statement per JSON object.
This is useful for seeding relational databases with data from REST APIs, importing API responses into PostgreSQL or MySQL for analysis, migrating from NoSQL (MongoDB, Firestore) to relational databases, and setting up test databases with realistic fixture data. Column types are inferred automatically from the values in your JSON.
JSON to SQL Example
Input JSON array:
json
[
{"id": 1, "name": "Ravi", "active": true, "score": 9.5},
{"id": 2, "name": "Priya", "active": false, "score": 8.2}
]Generated PostgreSQL:
sql
CREATE TABLE "data" (
"id" INTEGER,
"name" VARCHAR(255),
"active" BOOLEAN,
"score" NUMERIC
);
INSERT INTO "data" ("id", "name", "active", "score") VALUES (1, 'Ravi', TRUE, 9.5);
INSERT INTO "data" ("id", "name", "active", "score") VALUES (2, 'Priya', FALSE, 8.2);Dialect Differences
| Feature | PostgreSQL | MySQL | SQLite | SQL Server |
|---|---|---|---|---|
| Identifier quoting | "name" | `name` | "name" | [name] |
| Boolean type | BOOLEAN | BOOLEAN | TEXT | BIT (1/0) |
| Integer type | INTEGER | INTEGER | INTEGER | BIGINT |
| Float type | NUMERIC | REAL | REAL | FLOAT |
| Long strings | TEXT | TEXT | TEXT | TEXT |
| JSON columns | JSONB | JSON | TEXT | TEXT |
Common Use Cases
- ▸Data import — Convert exported JSON from an API or NoSQL database into SQL for import into PostgreSQL or MySQL.
- ▸Database seeding — Generate INSERT statements from JSON fixtures to seed your development or test database.
- ▸Schema bootstrapping — Quickly prototype a table schema from a sample JSON payload without writing SQL manually.
- ▸Data migration — Migrate data from a JSON-based store (MongoDB, DynamoDB) to a relational database.