If by some cosmic accident you want this as a once-off DB operation or you happen to use [SQLiteSpeed] (https://sqlitespeed.com/) for a DB manager, then there is an SQL function called "TitleCase()" that you can use which will render:
- TitleCase('JOHNNY') --> 'Johnny'
- TitleCase('john smith') --> 'John Smith'
- TitleCase('jOhNnY b. GOODE') --> 'Johnny B. Goode'
- TitleCase('my name') --> 'My Name'
- etc.
Failing that, the best option is to add such a UDF to the SQLite library that you are using [as explained here](https://sqlite.org/c3ref/create_function.html).
Note some base peculiarities with the above function (or things to consider if you are making your own) that may or may not be desired:
- TitleCase('joe McAdam') --> 'Joe Mcadam'
- TitleCase('Mary-joe smith') --> 'Mary-Joe Smith'
- TitleCase('JK. Rowling') --> 'Jk. Rowling'
Other than that, as Gunther mentioned, best to do it inside your application code.
Good luck!