PostgreSQL – REVERSE Function
The REVERSE
function is used to reverse the order of characters in a given string. It takes a string as an argument and returns a new string with the characters reversed.
Here’s the basic syntax of the REVERSE
function:
REVERSE(string)
string
is the string that you want to reverse.
Here’s an example of using the REVERSE
function:
SELECT REVERSE('Hello, World!'); -- Returns '!dlroW ,olleH'
In this example, the REVERSE
function has reversed the characters in the input string ‘Hello, World!’.
You can use the REVERSE
function with column values in a table as well. For instance, if you have a table named employees
with a column named name
, you can reverse the characters in the words like this:
SELECT REVERSE(name) FROM employees;
This query will return a result set with all the name
values reversed.
The REVERSE
function can be useful in various scenarios, such as when you need to manipulate or analyze strings in a reversed order.