In Oracle, reverse sorting can be achieved through the ORDER BY clause: use the ORDER BY column_name DESC syntax, where column_name is the name of the column to be sorted. For example: SELECT first_name, last_name FROM employees ORDER BY last_name DESC.
Reverse sorting in Oracle
In Oracle, you can use ORDER BY
clause to sort the data in reverse order. The syntax is as follows:
<code>SELECT column_name(s) FROM table_name ORDER BY column_name(s) DESC;</code>
where:
-
column_name
is the column name to be sorted. -
DESC
Specifies reverse order.
Example
Suppose we have a table named employees
with the following columns:
employee_id
- ##first_name
- last_name
last_name To sort the columns in reverse order, you can use the following query:
<code>SELECT first_name, last_name FROM employees ORDER BY last_name DESC;</code>The result set will be displayed in the following order:
<code>+-----------+------------+ | first_name | last_name | +-----------+------------+ | John | Smith | | Jane | Doe | | Bob | Jones | | Alice | Brown | +-----------+------------+</code>
Additional Notes
- You can specify multiple columns in the
- ORDER BY
clause for multi-column sorting.
You can also use the - ASC
keyword to specify ascending sorting.
You can use aliases in the - SELECT
clause to simplify the column names of the result set.
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