Download QuestDB JDBC Driver
What Is a JDBC Driver?
A JDBC driver is a Java library file (.jar) that enables Java applications to communicate with a database. The JDBC is a standard interface implemented by each database with a specific driver. Drivers are typically distributed by the database vendor or as open-source projects.
Understanding the JDBC URL
The connection parameters including the database location, database name and connection method are passed to the driver using the JDBC URL. The JDBC URL is a text starting with 'jdbc:...' which combines the hostname, port, database name, and any driver-specific parameters. The exact syntax can be different for each JDBC driver.
The QuestDB JDBC Driver
QuestDB is a high-performance open-source time-series database designed for high-throughput ingestion (millions of rows per second) and fast SQL queries. It uses a column-based storage model and is optimized for financial tick data, IoT telemetry, and observability metrics.
QuestDB is compatible with the PostgreSQL wire protocol, so DbSchema connects using the PostgreSQL JDBC driver.
The QuestDB JDBC URL
- Required File(s): postgresql-nn.jdbc3.jar
- Java Driver Class: org.postgresql.Driver
- JDBC URL: jdbc:postgresql://HOST[:PORT]/DB
- Website: QuestDB
Download PostgreSQL-compatible JDBC Driver for QuestDB
The driver archive is a zip file. Extract it and load the .jar files using DbSchema's Driver Manager.
DbSchema and QuestDB
DbSchema connects to QuestDB using the PostgreSQL-compatible JDBC driver and renders QuestDB tables with designated timestamp columns and partition strategies in the schema diagram.
Test the JDBC Driver using DbSchema
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Install DbSchema in minutes
DbSchema is free. Download the installer for Windows, macOS, or Linux and start DbSchema. No signup required.
Connect or open a sample
Reverse engineer an existing database or open a sample model to explore tables, relations, and indexes visually.
Design, document, deploy
Edit your schema, generate interactive documentation, and roll out reviewed changes across environments.
Explore QuestDB Visually with DbSchema
Once the JDBC driver is configured, DbSchema connects to your QuestDB database and gives you a full graphical workbench — no command-line required. Available as a free Community Edition and a full-featured PRO Edition. No registration needed to get started.
Interactive ER Diagrams
Reverse-engineer your QuestDB schema into a drag-and-drop ER diagram. Arrange tables visually, add new columns, define foreign keys, and let DbSchema generate the DDL — all without writing SQL by hand.
Visual Query Builder
Compose QuestDB queries by clicking on tables and columns — no SQL knowledge required. Add joins, filters, groupings, and aggregations through a point-and-click interface, then copy the generated SQL or run it directly against the live database.
Relational Data Explorer
Browse QuestDB table data and follow foreign key relationships across tables in a single view. Edit cells inline, filter rows, and paginate through large datasets — all without leaving the explorer.
Schema Synchronization
Compare your QuestDB schema across development, staging, and production environments. DbSchema generates the exact ALTER statements needed to close the gap and lets you review every change before executing — reducing the risk of unintended schema drift.
SQL Editor
Write and execute QuestDB queries in the integrated SQL editor with schema-aware autocomplete, syntax highlighting, and instant result display. Run scripts, inspect execution plans, and export results to CSV or JSON from a single interface.
HTML Schema Documentation
Generate a static HTML site documenting every table, column, type, index, and relationship in your QuestDB schema. Share it with your team or embed it in your project wiki — no extra tooling required.
For the full feature list and edition comparison, visit the DbSchema PRO Edition page.
Go deeper with QuestDB in DbSchema
ER diagrams, Git-based versioning, random data generator, and HTML schema docs.