Feb 7, 2025 · In SQL, the COUNT () function is used to count the number of rows that match a specified condition. The DISTINCT keyword is used to return only distinct (unique) values. When combined, …

DISTINCT COUNT(*) will return a row for each unique count. What you want is COUNT(DISTINCT <expression>): evaluates expression for each row in a group and returns the number of unique, non …

Count Distinct By using the DISTINCT keyword in a function called COUNT, we can return the number of different countries.

Nov 20, 2024 · In this article, we’ll walk through how to count distinct values with conditions using SQL. We’ll see how to use the WHERE clause, apply multiple conditions, and count across columns.

Nov 22, 2022 · COUNT DISTINCT will work exactly like COUNT except that it will only count rows that are non-null AND are unique within the row. Consider the non-nullable text column of the sample …

Jul 21, 2025 · Learn how to count distinct values in SQL with COUNT DISTINCT function. Master SQL techniques for unique data analysis with multiple columns and aggregate functions.

In this tutorial, you will learn how to use the SQL Server COUNT DISTINCT to get the total number of unique values in a column of a table.

Jul 23, 2025 · We can simply count distinct values using COUNT () method with the DISTINCT keyword along with column names. We have explained various use cases of counting distinct values in My …

Mar 1, 2025 · COUNT () returns the total number of rows that match your query criteria, including duplicates, while COUNT (DISTINCT) returns the number of unique values in a specified column, …

Apr 5, 2019 · Be aware that Count () ignores null values, so if you need to allow for null as its own distinct value you can do something tricky like: + count(distinct Case when my_col is null then 1 else …