I needed to give a certain illustration. This is the genuine-globe query I am now optimizing for MySQL 8. I desire to get all messages without any recipients or with only deleted recipients. Theta-join is analogous to a Unique case of internal join wherever the on is actually a theta https://bsgpentictonbc77531.mpeblog.com/65319792/how-to-join-outlaw-motorcycle-clubs-book-no-further-a-mystery