About Comma-Separated and Tab-Separated FilesA comma-separated values file (.csv) or a tab-separated values file (.tab or .tsv) is a file that represents a table of data. Each column/field value is separated by a comma or a semicolon (for .csv) or a tab character (for .tab or .tsv). Each record is separated by a carriage return. One record appears in each row of the data file. Often, the first row of data in the .csv file represents the column names for the table, making it easier to match the data to the fields in an existing library.Note Some locales may use a different separator in .csv files rather than commas. The default separator is defined by your locale setting.