From the previous blogpost:– CSV or alternatives? Exporting data from SQL Server data to ORC, AVRO, Parquet, Feather files and store them into Azure data lake we have created Azure blob storage, connected secure connection using Python and started uploading files…
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Comparing performances of CSV to RDS, Parquet, and Feather file formats in R
Tagged with: arrow, benchmark, CSV, feather, file compare, Parquet, R, Spark
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Posted in Uncategorized
CSV or alternatives? Exporting data from SQL Server data to ORC, AVRO, Parquet, Feather files and store them into Azure data lake
CSV data format is an old format and very common for data tasks, like import, export or storing. And when it comes performance of creating CSV file, reading and writing CSV files, how does it still stand against some other…
Tagged with: AVRO, Azure, azure blob storage, benchmark, Blob store, compare, CSV, file formats, ORC, Parquet, Python, storage container
Posted in Uncategorized
Posted in Uncategorized
R null values: NULL, NA, NaN, Inf
R language supports several null-able values and it is relatively important to understand how these values behave, when making data pre-processing and data munging. In general, R supports: NULL NA NaN Inf / -Inf NULL is an object and is…
Tagged with: CSV, Data import, data types, import CSV, NA, NULL, R, SQL Server
Posted in Uncategorized
Posted in Uncategorized
Importing CSV data using T-SQL and R
Several ways exists to import CSV (excel) data into your SQL Server Database. One is of course, using SSIS. The other one – similar to SSIS – is using import/export function in SSMS. With wizard, you will be able to…
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