How the REVERSE() function works in Mariadb?

The REVERSE() function in MariaDB is a string function that returns the supplied string with all its characters reversed.

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The REVERSE() function in MariaDB is a string function that returns the supplied string with all its characters reversed. It is a powerful tool that can be used for a variety of purposes, such as:

  • Reversing the order of words in a sentence
  • Reversing the order of characters in a string
  • Creating palindromes
  • Converting text to a different format

This article will provide an overview of the REVERSE() function, including its syntax, arguments, and usage. We will also provide several examples to illustrate how the function can be used in different scenarios.

Syntax

The basic syntax of the REVERSE() function is as follows:

REVERSE(str)

Where:

  • str is the string that you want to reverse.

The REVERSE() function is case-sensitive, so it will reverse the order of characters in the string regardless of their case.

Examples

The following are a few examples of how the REVERSE() function can be used:

Example 1: Reversing the order of words in a sentence

Suppose you have a string that contains a sentence. You can use the REVERSE() function to reverse the order of words in the sentence as follows:

SELECT REVERSE('This is a sentence.');

This will return the following string:

ecnetnes a si sihT

Example 2: Reversing the order of characters in a string

Suppose you have a string that contains a word. You can use the REVERSE() function to reverse the order of characters in the word as follows:

SELECT REVERSE('hello');

This will return the following string:

olleh

Example 3: Creating palindromes

A palindrome is a word or phrase that reads the same backward as it does forward. You can use the REVERSE() function to create palindromes as follows:

SELECT REVERSE('racecar');

This will return the following string:

racecar

Example 4: Converting text to a different format

Suppose you have a string that contains text in a specific format. You can use the REVERSE() function to convert the text to a different format as follows:

SELECT REVERSE('12345');

This will return the following string:

54321

The following are some functions that are related to the REVERSE() function:

  • LTRIM(): This function removes leading spaces from a string.
  • RTRIM(): This function removes trailing spaces from a string.
  • SUBSTR(): This function returns a substring from a string.
  • INSTR(): This function returns the position of the first occurrence of a substring within a string.

Conclusion

The REVERSE() function is a powerful tool that can be used for a variety of purposes. By understanding the syntax and arguments of the function, you can use it to perform a variety of tasks on string data.