In SQL, the REVERSE function is used to reverse the order of characters in a given string. The syntax for using the REVERSE function is generally as follows:
SELECT REVERSE(your_string) AS ReversedString;
Here, your_string is the string you want to reverse.
Example
If you have a string 'Hello World' and want to reverse it, you would write:
SELECT REVERSE('Hello World') AS ReversedString;
This query would return:
ReversedString
---------------
dlroW olleH
Usage in Different SQL Databases
Note that the specific syntax might be slightly different or may not be available in all SQL databases. For instance:
- SQL Server, MySQL, and PostgreSQL: Support the REVERSE function as described.
- Oracle: You would need to use a combination of LENGTH, SUBSTR, and a loop to achieve the same effect since there is no built-in REVERSE function.
Always refer to your specific SQL database documentation for the exact function and syntax available.