https://www.toidang.xyz/tags/count/ Recent content in COUNT on ToiDB https://www.toidang.xyz/web/static/me-512x512.png https://www.toidang.xyz/web/static/me-512x512.png Hugo en Wed, 12 Jun 2024 10:55:39 +0700 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.