May I ask for what purpose? Storing data in an encrypted way can result in a very slow database.
Encrypting a database is said to impose 5-20% overhead. Depending on nature of data, encryption might be mandated by law.
If a database is hosted "in the cloud" unencrypted, they are at risk of leakage and unauthorized modifications / deletion by the cloud provider's employees and bad actors who break into the cloud infrastructure.