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.

Another form of the COUNT function that accepts an asterisk (*) as the argument is as follows: The COUNT(*) function returns the number of rows in a table in a query. It counts duplicate rows and …

Nov 22, 2025 · Counting the Number of Rows with COUNT (*) When we want to count all the rows in a table, regardless of the column values, we can use COUNT (*). It counts every row, including rows …

SQL COUNT () The SQL COUNT() function returns the number of records returned by a query. Example -- returns the count of rows in the Orders table SELECT COUNT(*) FROM Orders; Here, the above …

Jan 14, 2025 · When the * is used for COUNT (), all records ( rows ) are COUNTed if some content NULL but COUNT (column_name) does not COUNT a record if its field is NULL. Explanation: This …

Nov 18, 2025 · COUNT(*) doesn't require an expression parameter because by definition, it doesn't use information about any particular column. COUNT(*) returns the number of rows in a specified table, …

TIP: Use the primary key in the COUNT function or COUNT (*) if you want to be certain that records aren't excluded in the calculations. Let's look at an example that shows how to use the COUNT …

Dec 12, 2024 · In this article, I'll show you the many ways in which COUNT() is useful, from its basic syntax to more interesting use cases with GROUP BY and HAVING. Consider also enrolling in our …

Mar 16, 2023 · To count unique (non-duplicate) values in a certain column, you put the DISTINCT keyword inside COUNT(), followed by the name of the column. With this syntax, the function returns …

In this example, the COUNT (*) function counts the total number of rows in the customers table. You can also use the COUNT function with a specific column to count the number of non-null values in that …