How to massively change string capitalization in a table?

Question

I have a project where authors' names have been inserted in all capital letters (ex. JOHN KRAUS, LEONARD MILES, NAOMI DAWSON). Now I need these values in "normal" case (ex. John Kraus, Leonard Miles, Naomi Dawson)

How can I achieve that?

Answer 1

Mysql has a mechanism called cursors that allows to read all the rows from the table one by one. Detailed description can be found here:

https://dev.mysql.com/doc/refman/8.0/en/cursors.html

You have to write a stored routine with a cursor loop inside and to place some case transforming logic in it. Useful functions are LOWER(), UPPER(), SUBSTRING() and other text functions described here:

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