You can ignore duplicates by using the DISTINCT keyword in the COUNT() function. If DISTINCT is specified, rows with the same value for the specified column will be counted as one.

This tutorial shows you how to use the SQL COUNT () function to get the number of rows in a table.

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 …

Jun 28, 2023 · Learning how to use the SQL COUNT() function is essential for anyone dealing with data and can greatly improve efficiency when managing large datasets. In a typical SQL query, users may …

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:

Nov 18, 2025 · COUNT(*) returns the number of rows in a specified table, and it preserves duplicate rows. It counts each row separately. This includes rows that contain null values. The …

Jan 14, 2025 · COUNT () returns 0 if there were no matching rows. Syntax: The above syntax is the general SQL 2003 ANSI standard syntax. This helps to understand the way SQL COUNT () Function …

Dec 12, 2024 · COUNT(), used with GROUP BY, is useful for counting the number of rows that belong to each group. COUNT(), used with HAVING, is useful for filtering groups according to the number of …

It is used to return the number of rows or non-null values in a column. The COUNT function syntax is as follows: In this syntax, column_name specifies the name of the column for which you want to count …

We can use COUNT() with WHERE to count rows that match the given value. Here, the SQL command returns the count of customers whose country is the UK. If we need to count the number of unique …