How to perform data conversion and formatting operations in MySQL?

In MySQL, built-in functions can be used for data conversion and formatting operations. Here are some commonly used functions:

1. Converts a value (of any type) into a specified datatype.

SELECT CAST('123' AS SIGNED);

1. Change the data type

SELECT CONVERT('2022-01-01', DATE);

1. Format the date

SELECT DATE_FORMAT('2022-01-01', '%Y/%m/%d');

1. Combine()

SELECT CONCAT('Hello', 'World');

1. convert all characters in the text to uppercase
2. convert to lowercase

SELECT UPPER('hello');
SELECT LOWER('WORLD');

These functions can assist you in transforming and formatting data to better suit your needs.