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sas proc sql joins data merging

data step merge statements corresponding to various joins.

INNER JOIN

merge data1 (in=a) data2 (in=b); by id;
if a and b;

LEFT JOIN

merge data1 (in=a) data2 (in=b); by id;
if a;

RIGHT JOIN

merge data1 (in=a) data2 (in=b); by id;
if b;

FULL JOIN
merge data1 (in=a) data2 (in=b); by id;

[ Quicktips 0206, A Visual Introduction to SQL Joins:, sql workshop at PennPop ]

Posted by on July 14, 2005 4:56 PM |

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