The **`REVERSE()`** function reverses the order of a string. 

Figure 1 shows a visual representation of the `REVERSE()` function.

# Syntax
```sql
REVERSE(string)
```
# Parameters
The `REVERSE()` function takes a string as a parameter.

# Return value
`REVERSE()` returns the string sent as a parameter in the reverse order. 
> This function returns `NULL` if `NULL` is sent as a parameter. 

# Example

-- simple string
SELECT REVERSE('HELLO');

-- palindrome string
SELECT REVERSE('LEVEL');

-- NULL 
SELECT REVERSE(NULL);


What is REVERSE() in SQL?

It reverses the order of a string, returning NULL if the input is NULL.