Select integer column as corresponding letter of the alphabet

I have an int column that contains values no larger than about 20. I want to select as its corresponding upper case letter of the alphabet:

1 = A
2 = B
3 = C
...

I don’t care what happens after Z because the column doesn’t contain larger values. Is there a simple way to do this with a SQL query, to convert to a single-byte character like this?

Answer

Add 64 to your integer and you have the ASCII value of the letter you want.

mysql> select CHAR(1+64);
+------------+
| CHAR(1+64) |
+------------+
| A          |
+------------+

Read https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_char