Comparison with other toolsComparison with other tools Comparison with R / R libraries Quick referenceBase Rplyrreshape / reshape2 Comparison with SQL SELECTWHEREGROUP BYJOINUNIONPandas equivalents for some SQL analytic and aggregate functionsUPDATEDELETE Comparison with SAS Data structuresData input / outputData operationsString processingMergingMissing dataGroupByOther Considerations Comparison with Stata Data structuresData input / outputData operationsString processingMergingMissing dataGroupByOther considerations