Transcription of Stata: Software for Statistics and Data Science | Stata
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Stata: Software for Statistics and Data Science | Stata
merge datasetsDescriptionQuick startMenuSyntaxOptionsRemarks and examplesReferencesAlso seeDescriptionmergejoins corresponding observations from the dataset currently in memory (called the masterdataset) with those (called the using dataset), matching on one or more perform match merges (one-to-one, one-to-many, many-to-one, and many-to-many), which are often calledjoinsby database also perform sequential merges,which have no equivalent in the relational database for adding new variables from a second dataset to existing observations. You usemerge, for instance, when combining hospital patient and discharge datasets. If you wish to add newobservations to existing variables, then see [D] append . You useappend, for instance, when addingcurrent discharges to past link datasets in separate frames, you can use thefrlinkandfrgetcommands.
Title stata.com merge ... append. You use append, for instance, when adding current discharges to past discharges. To link datasets in separate frames, you can use the frlink and frget commands. Linking and merging solve similar problems, and each is better than the other in some ways. You may prefer
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