Bash script. How to delete files?

Question

Backup

Hello!
There is a Bash script that makes a backup copy of the database. File name template: ${db}-${DATE}
Could you tell me how to add a script so that it deletes old versions of backups?

Answer 1

Filename pattern: ${db}-${DATE}

It's better to prefix DBBACK__${db}-${DATE} or use a separate directory
before inserting, check how the line works in your particular case

find . -type f -file "DBBACK__*" -mtime +1 -exec echo {} \;

Answer 2

Delete all files older than 30 days in the current directory.

find ./ -type f -mtime +30 -print0 | xargs -0 rm -f