In which of the following file formats is data from Delta Lake tables primarily stored?
In which of the following file formats is data from Delta Lake tables primarily stored?
Data from Delta Lake tables is primarily stored in Parquet file format. This columnar storage format is optimal for query performance and data compression, supporting advanced features like partition pruning which makes it faster than formats like CSV.
Parquet format is correct
so i think data from delta lake is stored in parquet format .. while the storage format seems to be delta .. very confusing some notes : What format does Delta Lake use to store data? Delta Lake uses versioned Parquet files to store your data in your cloud storage. Apart from the versions, Delta Lake also stores a transaction log to keep track of all the commits made to the table or blob store directory to provide ACID transactions. https://docs.delta.io/latest/delta-faq.html
parquet format
Buddy it should be Parquet, hence C
Parquet it is
Parquet format because its columnar format, much faster alternative to CSV because it supports partition pruning for example. No such file format as "Delta"
Parquet
Parquet for data and JSON for metadata