I need to combine two data tables as below: DATA table1; INPUT  Time Results; Lines; 0  255  6  263  12  236  18  233  ; RUN; DATA table2; INPUT  Time Results_2; Lines; 0  250  6  237  12  233  18  234  ; RUN; The output that I need is as below: Time Results Time Results 0 255 0 250 6 263 6 237 12 236 12 233 18 233 18 234 The usual horizontal concatenation procedures such as MERGE and SET would combine the Time column.  If need to simply paste together the tables side-by-side, by row numbers (in general, I can have more than 2 data sets and may not have the same number of rows), how can I do that? Thanks, -Richard ... View more