Question​

How do I use the EXCHANGE command to switch table names?

Question​

How do I output the send_logs_level output to a file using the ClickHouse Client for multiple statements and multiple lines?

Types of profilers​

LLVM already includes a tool that instruments the code that allows us to do instrumentation profiling. As opposed to sampling or statistical profiling, it's very precise without losing any calls, at the expense of needing to instrument the code and be more resource expensive.

With the introduction of the new JSON data type, ClickHouse is now a good choice of database for doing JSON analytics. In this guide, we're going to learn how to load JSON messages from Apache Kafka directly into a single JSON column in ClickHouse.

Question​

How can I connect to ClickHouse using SSH Key Authentication?

The table below provides the mapping for the metrics used in system.dashboards to Prometheus metrics in system.custom_metrics.
This is useful for customers who want to monitor for the same metrics found in system.dashboards.

Question​

When trying to connect from PowerBI to ClickHouse using the connector, you receive a authentication error.

Question​

How do I create a table that can query other clusters or instances?

Question​

What data types should I use in ClickHouse to optimize my queries for speed and storage?

Question​

If I have varying attributes in a column using map types, how can I extract them and use them in queries?