COS Select allows you to filter out desired data at the storage level, significantly reducing the amount of data transferred by COS, thereby lowering your usage costs, and improving data acquisition efficiency. In the COS console, you can extract data from individual files stored in buckets using the standard SQL templates we provide or by specifying statements that comply with syntax rules.
- COS Select currently supports objects in JSON or CSV format only in public cloud regions (Chinese mainland), and objects in Parquet format only in Beijing region.
- Please make sure the file to be extracted complies with COS Select specifications. For more information on COS Select specifications, please see SELECT Overview.
- COS Select in the console supports extraction of up to 40 MB data from a maximum of 128 MB files. To process larger files or extract more data, please use the API or SDKs.
Currently, only objects in the STANDARD, STANDARD_IA, and INTELLIGENT TIERING storage classes can be extracted.