For personal projects I'm using sqlite and postgres.
At work we're using MySQL 8.0 (RDS)
These days itโs all about Postgres, Clickhouse, Snowflake.
Work: Oracle (mostly), Postgres
Private: SQLite
MS SQL Server at work and SQLite + Postgres for side projects
SQL Server until recently.
SQLite, Oracle, MySql, occasionally SQL Server
BigQuery, occasional CloudSQL
Arango DB
BigQuery
Postgres since 1998.
MySQL Redis
Postgres
Mysql
Sybase
In the past (Oracle - for nearly 25yrs, SQLServer, Redis, Sqlite, Postgres, MongoDb)
Currently Snowflake, CouchbaseDb, CosmosDb, Sqlserver connection to Microsoft Dynamics backend dataverse.