reverse
Reverses the order of characters in a string.
The returned value is the same length as the input, but with the characters in reverse order. If subject is NULL, the result is also NULL.
Syntax
Section titled “Syntax”reverse(<subject>)Examples
Section titled “Examples”This example reverses a string:
SELECT reverse('Hello, world!');+--------------------------+| reverse('Hello, world!') |+--------------------------+| !dlrow ,olleH |+--------------------------+