DATASOURCE Procedure OverviewGetting StartedSyntaxDetailsExamplesReferences Getting Started: DATASOURCE Procedure Subsections: Structure of a SAS Data Set Containing Time Series Data Reading Data Files Subsetting Input Data Files Controlling the Frequency of Data: The INTERVAL= Option Selecting Time Series Variables: The KEEP and DROP Statements Controlling the Time Range of Data: The RANGE Statement Reading in Data Files Containing Cross Sections Obtaining Descriptive Information on Cross Sections Subsetting a Data File Containing Cross Sections Renaming Time Series Variables Changing the Lengths of Numeric Variables Last updated: June 19, 2025