How to use SQL count in order by clause?
SQL COUNT(*) with ORDER BY clause example. You can use the COUNT(*) function in the ORDER BY clause to sort the number of rows per group. For example, the following statement gets the number of employees for each department and sorts the result set based on the number of employees in descending order.
How to count the number of orders per customer?
SELECT CID, Count (DISTINCT O.OrderID) AS TotalOrders, Sum (OI.Quantity*OI.SalePrice) AS TotalDollarAmount FROM [Order] O INNER JOIN [OrderItem] OI ON O.OrderID = OI.OrderID GROUP BY CID Order BY Count (DISTINCT O.OrderID) DESC Which Access unfortunately does not support.
How do you count IDs in order by?
Then, in the ORDER BY clause, you use the aggregate function COUNT, which counts the number of values in the column of your choice; in our example, we count distinct IDs with COUNT (id). This effectively counts the number of elements in each group.
How to sort result set by first name?
The result set now is sorted by the first_name column. To sort by the employees by the first name in ascending order and the last name in descending order, you use the following statement: First, the database system sorts the result set by the first name in ascending order, then it sorts the sorted result set by the last name in descending order.
How to use the count ( * ) function in SQL?
SELECT e.department_id, department_name, COUNT (*) FROM employees e INNER JOIN departments d ON d.department_id = e.department_id GROUP BY e.department_id ORDER BY COUNT (*) DESC; To filter the groups by the result of the COUNT (*) function, we need to use the COUNT (*) function in the HAVING clause.
How to limit and order by in SQL queries?
Just add more column names and ordering keywords – i.e. ASC and DESC – separated by commas. The ORDER BY keywords are only used once. The following (somewhat nonsensical) query will return the rows in reverse-alphabetical order of state, then in ascending order of count, i.e. the least common names:
When to use DESC or order by in SQL?
The ORDER BY clause, as you can imagine, let’s us specify the sorting order of the returned data rows. Here’s a standalone example: By default, ORDER BY sorts in ascending order. When it comes to numbers, that means smallest first. If we want to find the rows with the largest count values, we use the DESC keyword.