https://www.toidang.xyz/tags/sql/ Recent content in SQL on ToiDB https://www.toidang.xyz/web/static/me-512x512.png https://www.toidang.xyz/web/static/me-512x512.png Hugo en Sun, 14 Jul 2024 09:31:23 +0700 https://www.toidang.xyz/posts/2024/07/09/introduction-apache-doris-a-distributed-sql-based-data-warehouse-system/ Tue, 09 Jul 2024 12:00:00 +0000 https://www.toidang.xyz/posts/2024/07/09/introduction-apache-doris-a-distributed-sql-based-data-warehouse-system/ Learn about Apache Doris, a distributed SQL-based data warehouse system that offers high performance and scalability for data analytics. https://www.toidang.xyz/posts/2024/06/29/introduction-to-duckdb-the-new-database-for-data-analysis/ Sat, 29 Jun 2024 10:00:00 +0000 https://www.toidang.xyz/posts/2024/06/29/introduction-to-duckdb-the-new-database-for-data-analysis/ Discover DuckDB, the high-performance, easy-to-use database designed for modern data analysis. https://www.toidang.xyz/posts/2024/03/24/redash-empowering-data-visualization-and-collaboration/ Sun, 24 Mar 2024 07:09:55 +0700 https://www.toidang.xyz/posts/2024/03/24/redash-empowering-data-visualization-and-collaboration/ Redash is an open-source data visualization and collaboration platform that allows users to connect to various data sources, execute SQL queries, visualize data, and share insights with team members. Learn more about the key features of Redash and how it empowers organizations to make data-driven decisions. https://www.toidang.xyz/posts/2024/03/10/understanding-postgresql-countnull-count-and-count1/ Sun, 10 Mar 2024 09:08:55 +0700 https://www.toidang.xyz/posts/2024/03/10/understanding-postgresql-countnull-count-and-count1/ In PostgreSQL, the COUNT function is commonly used to count the number of rows in a table. However, there are subtle differences between COUNT(NULL), COUNT(*), and COUNT(1) that are worth understanding. Let’s delve into each of these variants, their usage, and performance implications. https://www.toidang.xyz/posts/2024/03/01/unlocking-the-power-of-postgresql-window-functions-a-comprehensive-guide/ Fri, 01 Mar 2024 21:08:55 +0700 https://www.toidang.xyz/posts/2024/03/01/unlocking-the-power-of-postgresql-window-functions-a-comprehensive-guide/ In PostgreSQL, window functions are a powerful feature that allows you to perform complex analytical calculations within SQL queries. By understanding the key features and common use cases of window functions, you can unlock their full potential and gain valuable insights into your data. https://www.toidang.xyz/posts/2024/02/28/understanding-postgresql-distinct-on/ Wed, 28 Feb 2024 21:08:55 +0700 https://www.toidang.xyz/posts/2024/02/28/understanding-postgresql-distinct-on/ In PostgreSQL, the DISTINCT ON clause is a powerful tool used in the SELECT statement to retrieve unique rows based on a specified set of columns. It is often combined with the ORDER BY clause to determine which unique rows to select.