ClickHouse Primary Key: Quick View Method

In ClickHouse, to view the primary key of a table, you can use the following query to obtain the table’s structure information, including the primary key column:

DESCRIBE TABLE table_name;

Replace the table_name in the above query with the actual table name you want to view, and then execute the query. This will allow you to see the structure information of the table, which will display the primary key column as well as other related column information.

If the table has a composite primary key (made up of multiple columns), the primary key columns will be listed in a comma-separated format. The primary key is used to uniquely identify rows in the table, and is crucial for the performance and optimization of ClickHouse.

Please note that ClickHouse does not require defining a primary key like some traditional database systems, but a primary key is essential for the performance and optimization of the data engine.