How to Install ClickHouse in PostgreSQL

How do I install ClickHouse on Ubuntu or Docker?

Install ClickHouse with APT or Docker, verify the setup, and integrate it with PostgreSQL for fast analytics.

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Description

What prerequisites are required?

Use a 64-bit Ubuntu 20.04+ host with sudo rights and open ports 9000 (native) and 8123 (HTTP). For Docker, install Docker 20.10+ and Docker Compose.

How to install ClickHouse with APT?

Add the GPG key:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv E0C56BD4
Add the repo:
echo "deb https://packages.clickhouse.com/deb stable main" | sudo tee /etc/apt/sources.list.d/clickhouse.list
Update & install:
sudo apt-get update && sudo apt-get install clickhouse-server clickhouse-client
Start the service:
sudo service clickhouse-server start

How to install ClickHouse with Docker?

Test instance:
docker run --name ch_test -d -p 9000:9000 -p 8123:8123 yandex/clickhouse-server
Production with volumes:
docker run --name clickhouse -d -p 9000:9000 -p 8123:8123 -v /opt/clickhouse/data:/var/lib/clickhouse -v /opt/clickhouse/log:/var/log/clickhouse-server yandex/clickhouse-server

How to verify the installation?

Connect:
clickhouse-client or docker exec -it clickhouse clickhouse-client
Run SELECT version(); to confirm the server is up.

How to create sample ecommerce tables?

CREATE DATABASE shop;
USE shop;
CREATE TABLE Orders (id UInt32, customer_id UInt32, order_date Date, total_amount Decimal(10,2)) ENGINE = MergeTree ORDER BY id;

How to integrate ClickHouse with PostgreSQL?

Install clickhouse_fdw in PostgreSQL, then create foreign tables pointing to ClickHouse. This lets PostgreSQL query large ClickHouse datasets while keeping OLTP writes local.

What are best practices after installation?

Store data on dedicated SSDs, enable backups, monitor system.query_log, and use ReplicatedMergeTree for HA. Set TTLs to auto-purge old partitions.

What mistakes should I avoid?

1. Skipping the GPG key causes apt 404 errors.
2. Running Docker without volume mounts erases data when the container is removed.

FAQ

Is ClickHouse free to use?

Yes. ClickHouse is Apache 2.0 licensed and fully open source.

Does ClickHouse replace PostgreSQL?

No. Keep OLTP workloads in PostgreSQL and replicate data to ClickHouse for OLAP queries.

How do I import PostgreSQL data into ClickHouse?

Use clickhouse-client --query with INFILE, clickhouse-copier, or CDC pipelines such as Debezium.

Why How to Install ClickHouse in PostgreSQL is important

How to Install ClickHouse in PostgreSQL Example Usage


SELECT order_date, sum(total_amount) AS daily_revenue
FROM shop.Orders
GROUP BY order_date
ORDER BY order_date DESC
LIMIT 10;

How to Install ClickHouse in PostgreSQL Syntax


APT:
  sudo apt-get install [--assume-yes] clickhouse-server clickhouse-client [clickhouse-common-static]

Docker:
  docker run --name <container_name> -d -p 9000:9000 -p 8123:8123 \
             [-e CLICKHOUSE_DB=shop] \
             [-v /host/data:/var/lib/clickhouse] \
             clickhouse/clickhouse-server:latest

SQL (ecommerce example):
  CREATE TABLE Orders (
      id UInt32,
      customer_id UInt32,
      order_date Date,
      total_amount Decimal(10,2)
  ) ENGINE = MergeTree
  ORDER BY id;

Common Mistakes

Skipping the GPG key when adding the APT repository leads to 404 errors during installation. Fix by importing the key first with apt-key.
Running Docker containers without volume mounts wipes data when the container is removed. Always bind host directories to /var/lib/clickhouse.