Oracle - Use Group Functions in ORDER BY Clause in Oracle

Use Group Functions in ORDER BY Clause in Oracle

Q

Can Group Functions Be Used in the ORDER BY Clause in Oracle?

✍: FYIcenter.com

A

If the query output is aggregated as groups, you can sort the groups by using group functions in the ORDER BY clause. The following statement returns how many employees are having the same salary in each department. The group output is sorted by the count in each group in descending order:

SQL> SELECT department_id, salary, count(*) 
  2  FROM employees GROUP BY department_id, 
  3  salary HAVING count(*) > 1 
  ORDER BY COUNT(*) DESC;
DEPARTMENT_ID     SALARY   COUNT(*)
------------- ---------- ----------
           50       2500          5
           50       3200          4
           50       2800          3
           80      10000          3
           80       9500          3
           50       3100          3
           50       2600          3
.....

⇒Understanding SQL SELECT Query Statements in Oracle

⇒⇒Oracle Database Tutorials

2019-10-27, 810👍, 0💬

Query with an Inner Join in Oracle
How To Write a Query with an Inner Join in Oracle? If you want to query from two tables with an inner join, you can use the INNER JOIN ... ON clause in the FROM clause. The following query returns output with an inner join from two tables: employees and departments. The join condition is that the de... 2019-10-27, 844👍, 0💬

Use Group Functions in ORDER BY Clause in Oracle
Can Group Functions Be Used in the ORDER BY Clause in Oracle? If the query output is aggregated as groups, you can sort the groups by using group functions in the ORDER BY clause. The following statement returns how many employees are having the same salary in each department. The group output is so... 2019-10-27, 811👍, 0💬

Count Duplicated Values in a Column in Oracle
How To Count Duplicated Values in a Column in Oracle? If you have a column with duplicated values, and you want to know what are those duplicated values are and how many duplicates are there for each of those values, you can use the GROUP BY ... HAVING clause as shown in the following example. It re... 2019-11-21, 703👍, 0💬

Ways to Join Two Tables in a Single Query in Oracle
How To Join Two Tables in a Single Query in Oracle? Two tables can be joined together in a query in 4 ways: Inner Join: Returns only rows from both tables that satisfy the join condition. Left Outer Join: Returns rows from both tables that satisfy the join condition, and the rest of rows from the fi... 2019-10-27, 634👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.