In 2002, the National Kidney Foundation published treatment guidelines that identified five stages of Chronic Kidney Disease (CKD) based on declining GFR measurements. The guidelines recommend different actions based on the stage of kidney disease.
CSV (Comma Separated Value) was a file format devised to store tabular data. It uses commas to separate each entry in a row and the newline symbol to go to the next row. Excel is a more recent spreadsheet application from Microsoft and it saves the data with its own file format.
Comma Separated Values (CSV) text format are commonly used in exchanging relational data between heterogeneous systems. Currently Hive uses TextFile format when displaying query results. This could cause confusions when column values contain new lines or tabs. A CSVTextFile format could get around this problem. This will require a new CSVTextInputFormat, CSVTextOutputFormat, and CSVSerDe. -- exporting a table to CSV files in a directory hive> set hive.io.output.fileformat=CSVTextFile; hive> insert overwrite local directory '/tmp/CSVrepos/' select * from S where ...