$ sqlite3 bod
SQLite version 3.34.0 2020-12-01 16:14:00
Enter ".help" for usage hints.
sqlite> create table Person (idPerson, email, altEmail);
sqlite> insert into Person values (1, 'you@example.com', '');
sqlite> insert into Person values (2, '', 'me@example.com');
sqlite> insert into Person values (3, 'me@example.com', '');
sqlite> select * from Person;
1|you@example.com|
2||me@example.com
3|me@example.com|
sqlite>