The official of GPG keys of MySQL are expired so the new installations and upgrades from the official package repository are failed with the following message.
MySQL Table can crash for a variety of reasons, such as an abnormal shutdown or a power failure. This can also occur if the operating system run low on disk.
This tutorial provide snippet on how to remove duplicate rows that may have created over time. This may be a result of a spam attack or by mistakenly repeating entries. They consume precious resources of the server and decrease over all performance of any system. There are many ways to remove duplicates rows form a MySQL server.
There are multiple ways to import database dumps in MySQL/MariaDB. First way to import databases it to use mysqldump utility.
MySQL snippet to select data between first day of the current month and current date.