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beekeeper-studio
Modern and easy to use SQL client for MySQL, Postgres, SQLite, SQL Server, and more. Linux, MacOS, and Windows.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
If you're talking about generating SQL, try https://github.com/tobymao/sqlglot. It allows you to define query logic using Python, and then generate Oracle and SQL Server (I assume with 'sql' you mean SQL Server -> try to use clear terminology please) compatible SQL.
Dbeaver, or https://www.beekeeperstudio.io/
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.