The COUNT() function returns the number of rows that matches a specified criterion. The behavior of COUNT() depends on the argument used within the parentheses: COUNT(*) - Counts the total …

The SQL COUNT function is an aggregate function that returns the number of rows returned by a query. For example, you can use the COUNT function in the SELECT statement to get the number of …

Nov 22, 2025 · We can use the COUNT () function along with CASE WHEN to count rows that match a specific condition. This is helpful when we want to count rows based on certain criteria without …

Feb 16, 2026 · The SQL COUNT () function returns the number of rows that match a specified condition. It is commonly used to determine the number of entries in a table, count distinct values, or count …

Let's look at an example that shows how to use the COUNT function with a single expression in a query. In this example, we have a table called employees with the following data:

Jan 20, 2026 · COUNT(*) returns the number of rows in a specified table, and it preserves duplicate rows. It counts each row separately, including rows that contain null values.

In conclusion, the SQL COUNT function is a powerful tool for counting rows or non-null values in a table or for counting rows that meet specific conditions. It is an essential function for data analysis and …