MySQL numeric functions

• ABS
• SQRT
• MOD
• CEIL and CEILING
• FLOOR
• RAND
• ROUND
• SIGN
• POW and POWER
• SIN
• ASIN
• COS
• ACOS
• TAN
• ATAN
• COT

MySQL string functions

• LENGTH
• CONCAT
• INSERT
• LOWER
• UPPER
• LEFT
• RIGHT
• TRIM
• REPLACE
• SUBSTRING
• REVERSE

MySQL Date/Time functions

• CURDATE and CURRENT_DATE
• CURTIME and CURRENT_TIME
• NOW and SYSDATE
• UNIX_TIMESTAMP
• FROM_UNIXTIME
• MONTH
• MONTHNAME
• DAYNAME
• DAYOFWEEK
• WEEK
• DAYOFYEAR
• DAYOFMONTH
• YEAR
• TIME_TO_SEC
• SEC_TO_TIME
• DATE_ADD and ADDDATE
• DATE_SUB and SUBDATE
• ADDTIME
• SUBTIME
• DATEDIFF
• DATE_FORMAT
• WEEKDAY

MySQL aggregate functions

• MAX
• MIN
• COUNT
• SUM
• AVG

MySQL flow control functions

• IF
• IFNULL
• CASE

MySQL REVERSE Function: Reverse A String

The REVERSE() function in MySQL is a string function that reverses the sequence of characters in a given string.

Here's the syntax:

REVERSE(string);

• string: the string you want to reverse.

For instance, if you want to reverse the string 'Hello', you can use the REVERSE() function as follows:

SELECT REVERSE('Hello');

This will return: 'olleH'

You can also use the REVERSE() function with columns in a table. For example, let's say you have a table users with a name column, and you want to reverse the names. You can do it like this:

SELECT name, REVERSE(name) as reversed_name
FROM users;

This query will return a result set with the original name and the reversed name for each row in the users table.

As with other MySQL functions, you can combine REVERSE() with other functions for more complex operations. For example, to count the number of 'a' characters in the reversed name, you could use:

SELECT name, LENGTH(REVERSE(name)) - LENGTH(REPLACE(REVERSE(name), 'a', '')) as count_a
FROM users;

This query first reverses the name, then counts the number of 'a' characters in the reversed name for each row in the users table.

Remember, the REVERSE() function does not change the original data in the table. It only returns the reversed string as a result of the query.

1. Reversing strings with MySQL REVERSE:

   • The REVERSE() function in MySQL is used to reverse the characters in a string, effectively reversing the order of characters.

   SELECT REVERSE('Hello, world!') AS reversed_string;
   -- Returns '!dlrow ,olleH'
   

2. Using REVERSE function in MySQL for string reversal:

   • The REVERSE() function is a convenient tool for reversing strings, which can be useful in various scenarios, such as reversing names or IDs.

   SELECT REVERSE('MySQL is great!') AS reversed_text;
   -- Returns '!taerg si LQeSQL'
   

3. MySQL REVERSE function example:

   • A basic example showcasing the usage of the REVERSE() function to reverse the characters in a given string.

   SELECT REVERSE('12345') AS reversed_numbers;
   -- Returns '54321'
   

4. How to reverse a string in MySQL:

   • To reverse a string in MySQL, use the REVERSE() function on the desired string.

   SELECT REVERSE('Database') AS reversed_word;
   -- Returns 'esabataD'
   

5. String manipulation in MySQL: REVERSE usage:

   • String manipulation tasks in MySQL can benefit from the REVERSE() function, providing a straightforward way to reverse strings.

   SELECT REVERSE('Coding is fun!') AS manipulated_text;
   -- Returns '!nuf si gnidoC'
   

6. MySQL string reversal with REVERSE:

   • The REVERSE() function is employed for reversing entire strings or portions of strings in MySQL.

   SELECT REVERSE('123-456-789') AS reversed_sequence;
   -- Returns '987-654-321'
   

7. Reversing text in MySQL using REVERSE function:

   • Reversing text in MySQL is achieved by applying the REVERSE() function to the desired text.

   SELECT REVERSE('abcdefg') AS reversed_text;
   -- Returns 'gfedcba'
   

8. Text reversal with REVERSE in MySQL:

   • The REVERSE() function facilitates text reversal in MySQL, allowing for flexible manipulation of character order.

   SELECT REVERSE('abcdefg') AS reversed_alphabet;
   -- Returns 'gfedcba'