proc sql; title 'Inner Join'; select * from lefttab as l inner join righttab as r on l.continent=r.continent; Outer joins are inner joins that have been augmented with rows that did not match with any ...

You can also surround CASE in double quotes ("CASE") and set the PROC SQL option DQUOTE=ANSI. The keywords AS, ON, FULL, JOIN, LEFT, FROM, WHEN, WHERE, ORDER, GROUP, RIGHT, INNER, OUTER, UNION, EXCEPT ...