Can materialized view be used as a data source in postgresql without any issue?

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Yes, materialized views can be used as a data source in PostgreSQL without any issue, provided that they are refreshing timeously as per your data requirements. Materialized views in PostgreSQL are just like regular tables, but their data is cached at the time of creation, allowing for faster query performance. They can be queried just like regular tables, and their data can be updated periodically by using the REFRESH MATERIALIZED VIEW command.