How to convet Json array to array of tuples in Clickhouse
I have a Json array {"foo":[{"a":"bar","b":10, "c":100}]}
How to convert it to the array of tuples Array(Tuple(String, Int64)) where String is a and Int64 is b?
How to join on “string contains” in ClickHouse
I need something like
How to add or control relationships between tables in Clickhouse?
As I understand, there’s no relationships between tables in clikhouse.
So how I need to check data to be sure that querys with join will works right?
Here by tables:
How to create table witn unique columns in Clickhouse?
I making table “clients” and thing I can’t understand.
How to add constraint unique values only for “client_id”?
ClickHouse: NO_COMMON_TYPE exception when I use a SELECT statement
I’m trying to select all items from ClickHouse DB where the viewIds array contains 341852351.
I run this query:
Spread a ClickHouse map as columns
I have a ClickHouse table with a tags column of type Map(String, String).
configuring ca_cert, client_cert, client_key, tls_enabled in kafka table in clickhouse
I want to connect CH to a TLS kafka cluster.
Clickhouse combine multiple row vectors/arrays as an average
In Clickhouse, I have a table like so:
How to retrieve the number of rows processed in a clickhouse query statement?
In this Doc, it shows clickhouse not only show the result of a query, but also the number of rows processed.
How to retrieve the rows processed in a clickhouse query statement?
In this Doc, it shows clickhouse not only show the result of a query, but also the number of rows processed.