我的数据源中有表，它是从数据库加载的，其中包含带有日期的列。我需要从该列中获取 MIN 和 MAX 值，并将值用作在 Power BI 中创建另一个（计算）表的参数。请问我该怎么做？
我尝试使用 data _null_;
/*
The relevant columns are probably named differently;
Check the table sashelp.vcolumn what the values in COLTYPE for character variables actually are
Don't know exactly out of my head
*/
set sashelp.vcolumn(where=(MEMNAME eq 'MY_TABLE' and COLTYPE in ('CHAR', 'VARCHAR'))) end=eof;
attrib COLNAMES format=$1000.;
retain COLNAMES;
/*
the following two lines concatenate all extracted column names;
choose one of the two
*/
/*concatenate all variable names in a string using || operator*/
COLNAMES = compbl(COLNAMES) || ', ' || compbl(COLNAME);
/*or via function catx*/
colnames=catx(', ',colnames,colname);
/*define a macro variable to hold all determined columns*/
if eof then do;
call symput('M_COLNAMES', compbl(COLNAMES));
end;
run;
/*print all found columns*/
%put Character columns: &M_COLNAMES.;
之类的东西，但这会返回整行，但我只需要“SortTime”列中的值......你能帮我吗？
答案 0 :(得分：2)
Start = List.Min(MyTable[SortTime])