It depends on the structure of your datasets, as well as on your purpose which method is the best option. Where id=4, variables v1 and v2 will be missing. In SAS, you can append datasets with the SET statement or the APPEND procedure. When you have two data files, you can combine them by merging them side by side, matching up observations based on an identifier. It will have five variables ( id, and v1 to v4) and four cases. In the example above, data set three is created by merging data sets one and two. data want (keep&commonlist.) dset1(keep&dset1list.) dset2(keep&dset2list.) set dataset1(inds1) dataset2(inds2) dataset3(inds3) output. Merging multiple datasets together Ask Question Asked 1 year, 1 month ago Modified 1 year, 1 month ago Viewed 157 times 0 Hello I have a listing Im struggling with as I dont think the code I am using is doing the job correctly. Are you sure that there is any overlap between the two sets of data Check that your variables are the same length. Records from both datasets are included, so if none of the keys match then the result will be the same as if you used SET instead of MERGE. The SAS codes below show how they can be sorted and merged: DATA one 4 Your code is the correct format for merging by multiple variables. Suppose you create two data sets ( one and If you merge data sets without sorting, called one-to-one merging, the data of the merged file will overwrite the primary data set without considering whether or not two observations are the same. To merge two or more data sets in SAS, you must first sort both data sets by a shared variable upon which the merging will be based, and then use the MERGE statement in yourÄATA statement.
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