What does sum distinct do in SQL?

Can we use distinct and sum together in SQL?

4 Answers. Distinct is used to select distinct elements, nothing more, while you want to aggregate and for that you need GROUP BY and aggregation functions ( SUM ).

What does distinct do in SQL?

The SELECT DISTINCT statement is used to return only distinct (different) values. Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values.

How do you sum distinct values?

Sum only unique values in Excel with formulas

  1. Type this formula: =SUMPRODUCT(1/COUNTIF(A2:A15,A2:A15&””),A2:A15) into a blank cell, see screenshot:
  2. Then press Enter key, and the numbers which appear only one time have been added up.
  3. Click Kutools > Select Tools > Select Duplicate & Unique Cells, see screenshot:

Is distinct aggregate function?

ALL applies the aggregate function to all values, and DISTINCT specifies that each unique value is considered. ALL is the default and rarely is seen in practice. With SUM(), AVG(), and COUNT(expr), DISTINCT eliminates duplicate values before the sum, average, or count is calculated.

IT IS INTERESTING:  What is mean by Anagram in Java?

What will the SQL Server return when distinct aggregate?

DISTINCT can be used to return unique rows from a result set and it can be used to force unique column values within an aggregate function.

Does SQL distinct apply to all columns?

Yes, DISTINCT works on all combinations of column values for all columns in the SELECT clause.

What is difference between unique and distinct in SQL?

Unique and Distinct are two SQL constraints. The main difference between Unique and Distinct in SQL is that Unique helps to ensure that all the values in a column are different while Distinct helps to remove all the duplicate records when retrieving the records from a table.

Is GROUP BY better than distinct?

While DISTINCT better explains intent, and GROUP BY is only required when aggregations are present, they are interchangeable in many cases.

What is sum distinct?

DISTINCT instructs the SUM() function to calculate the sum of the only distinct values. … expression is any valid expression that returns an exact or approximate numeric value. Note that aggregate functions or subqueries are not accepted in the expression.

How does sum product work?

The SUMPRODUCT function returns the sum of the products of corresponding ranges or arrays. The default operation is multiplication, but addition, subtraction, and division are also possible. SUMPRODUCT matches all instances of Item Y/Size M and sums them, so for this example 21 plus 41 equals 62.

How do you use Sumif formula?

If you want, you can apply the criteria to one range and sum the corresponding values in a different range. For example, the formula =SUMIF(B2:B5, “John”, C2:C5) sums only the values in the range C2:C5, where the corresponding cells in the range B2:B5 equal “John.”

IT IS INTERESTING:  Quick Answer: Do you say SQL SQL?

How do you use distinct aggregate?

2 Answers. If you use SELECT DISTINCT , then the result set will have no duplicate rows. If you use SELECT COUNT(DISTINCT) , then the count will only count distinct values. If you are thinking of using SUM(DISTINCT) (or DISTINCT with any other aggregation function) be warned.

How do you use distinct aggregate function?

First simple example of the a DISTINCT() function;

  1. SELECT SUM (DISTINCT (ID)) AS ‘Sum of distinct values’, SUM (ID) AS ‘Sum of all values’, …
  2. SELECT SUM (ID) AS ‘Sum of distinct values’ FROM (SELECT * …
  3. SELECT AVG (DISTINCT (ID)) AS ‘AVG of distinct values’, …
  4. SELECT COUNT (DISTINCT (ID)) AS ‘COUNT of distinct values’,

How do I count distinct values in SQL?

SQL to find the number of distinct values in a column

  1. SELECT DISTINCT column_name FROM table_name;
  2. SELECT column_name FROM table_name GROUP BY column_name;
Categories SQL