如何使用对同一数据库表的查询结果更新 MYSQL 表中的字段？

Question

I have a MYSQL database with one table named students. The table has three fields namely, regNumber, fullName, and email. The email field is currently empty for all records in the table. I am able to generate email addresses based on the regNumber and fullName columns. Below is the SQL script for achieving that:

SELECT  
    REPLACE(CONCAT(SUBSTRING(SUBSTRING_INDEX(SUBSTRING_INDEX(fullName, ' ', 1), ' ', -1), 1, 1),
    SUBSTRING_INDEX (SUBSTRING_INDEX(fullName, ' ', 3), ' ', -1),
    SUBSTRING(regNumber, 7, 4), "@ut.edu.ua"), '`', '') AS student_email 
FROM students;

However, I want to update the email field of every tupple with the result of executing the above script. How can I possibly achieve this?

Answer 1

update students
set email = REPLACE(CONCAT(SUBSTRING(SUBSTRING_INDEX(SUBSTRING_INDEX(fullName, ' ', 1), ' ', -1), 1, 1),
            SUBSTRING_INDEX (SUBSTRING_INDEX(fullName, ' ', 3), ' ', -1),
            SUBSTRING(regNumber, 7, 4), "@ut.edu.ua"), '`', '')