SAS：案例然后执行查询

Question

我想只在条件满足时才执行查询。 我想要执行的代码是：

proc sql NOPRINT OUTOBS=1;
%CASE WHEN (&_count_ > 0) THEN
DELETE FROM TABLE T
WHERE T.Period = xxxxxx
END;
quit;

Answer 1

使用IF代替CASE：

proc sql NOPRINT OUTOBS=1;
%IF(&_count_ > 0) %THEN %DO
DELETE FROM TABLE T
WHERE T.Period = xxxxxx
%END;
quit;

Answer 2

我找到了解决方案：

subgraph cluster_s1 { 1 2 }

Answer 3

proc sql;
DELETE FROM T
WHERE &_count_ > 0 and Period = xxxxxx
;quit;