Reverse

Description

The reverse function is used to reverse the order of elements in an input string or array. This function can handle different types of data, making it very flexible and practical.

Syntax

reverse(str)
reverse(array)

Parameters

• str (string type): The string that needs to be reversed.
• array (array type): The array that needs to be reversed.

Return Results

• Returns data of the same type as the input parameter, but with the elements in reverse order.

Example

1. Reverse a string:

SELECT reverse("hello");

Results:

olleh

2. Reverse String (including special characters and spaces):

SELECT reverse("a b c!@#");

Results:

#@! c b a

3. Reverse Array:

SELECT reverse(array(1, 2, 3));

Results:

[3, 2, 1]

4. Reverse Array (Including Negative Numbers and Zero):

SELECT reverse(array(-1, 0, 2, -3));

Results:

[-3, 2, 0, -1]

5. Reverse the string and combine with other functions for operations:

SELECT upper(reverse("hello"));

Results:

OLLEH

Notes

• The reverse function does not modify the original data but creates a new copy of the data in reverse order.
• When dealing with large amounts of data, the reverse operation may consume significant computational resources and time.

With the above examples and explanations, you can more easily use the reverse function to handle various data types. Please adjust and apply according to your actual needs.