Real-Time Analytics Strategy for Telcos

The telecommunications industry is experiencing unprecedented growth and transformation, driven by technological advancements, increasing customer demands, and evolving market dynamics. To stay relevant and competitive in this rapidly changing landscape, Telcos need to harness the power of real-time analytics. Real-time analytics provides Telcos with timely and actionable insights that empower them to make informed decisions, […]

How ChistaDATA helps companies globally in developing high-performance real-time analytics?

Once upon a time, in a rapidly evolving digital landscape, businesses faced the challenge of delivering real-time analytics to gain valuable insights and stay ahead of the competition. One company, ChistaDATA, emerged as a global leader in developing high-performance real-time analytics solutions, revolutionizing the way organizations harnessed the power of their data. In the vast […]

Are parallel plans good or bad for ClickHouse Performance?

Parallel query execution in ClickHouse can have both positive and negative effects on performance, depending on the specific use case and the characteristics of the data set. Here’s an explanation of the potential impact of parallel plans on ClickHouse performance using real-life data set examples: For example, consider a scenario where you need to perform […]

Space Management and Direct Path Load tips and tricks in ClickHouse

Space management and direct path load are important considerations in ClickHouse for optimizing storage efficiency and data loading performance. Here are some tips and tricks for space management and direct path load in ClickHouse: Space Management: Direct Path Load: By employing these tips and tricks for space management and direct path load in ClickHouse, you […]

How do I know if the cardinality estimates in a ClickHouse plan are accurate?

In ClickHouse, evaluating the accuracy of cardinality estimates in a query plan can be challenging since ClickHouse relies on different heuristics and sampling techniques to estimate cardinalities. However, you can take the following steps to gain insights into the accuracy of cardinality estimates: It’s important to note that ClickHouse’s cardinality estimation is not always exact […]

How do I display and read the execution plans for a SQL statement in ClickHouse?

To display and read the execution plans for a SQL statement in ClickHouse, you can follow these steps using real-life data sets: For this example, we’ll use a simple SELECT statement to retrieve data from the orders table: SELECT customer_id, COUNT(*) AS order_countFROM ordersGROUP BY customer_idORDER BY order_count DESC; This query will calculate the number […]

How to identify Overlapping Date Ranges in ClickHouse?

To identify overlapping date ranges in ClickHouse, you can use SQL queries that compare the start and end dates of each range to determine if there are any overlaps. Here’s an example using a real-life dataset of employee vacation schedules: Assume we have a ClickHouse table called “vacation_schedule” with the following structure: CREATE TABLE vacation_schedule […]

Implementing Groupings, Rollups and Cubes in ClickHouse

Grouping, rollup, and cube are SQL query operations that allow for grouping and aggregation of data based on multiple dimensions or attributes. In ClickHouse, these operations are implemented using the GROUP BY clause, which allows you to group data based on one or more columns. Here are some real-life data examples to illustrate how to […]

Optimize Query Performance in ClickHouse with Derived Tables

Derived tables are tables that are created on-the-fly as a result of a query. They are temporary tables that exist only for the duration of the query, and are not stored in the database. ClickHouse supports derived tables as a way to simplify complex queries and reduce the amount of data that needs to be […]