Execute Macro inside SQL statement -


the situation:

i have table mytable 2 columns: tablename , tablefield:

|-----------|------------| | tablename | tablefield | |-----------|------------| | table1    | id         | | table2    | date       | | table3    | etc        | |-----------|------------|

my core objective here basically, make select for each of these tablenames, showing max() value of corresponding tablefield.

proc sql; select max(id) table1; select max(date) table2; select max(etc) table3; quit;

ps: solution have pull data table, whether table change values, solutions make changes also.

what have tried:

from of attempts, sofisticated , believe nearest solution:

proc sql; create table table_associations (     memname varchar(255), dt_name varchar(255) );  insert table_associations  values ("table1", "id") values ("table2", "date") values ("table3", "etc"); quit;  %macro max(field, table); select max(&field.) &table.; %mend;  proc sql; select table, field, (%max(field,table)) lib.table_associations quit;

creating macro, intend clear but, example, should solve 2 problems:

  • execute macro inside sql statement; and
  • make macro understand string value parameter sql command.

in data step, can use call execute you're describing.

%macro max(field, table); proc sql; select max(&field.) &table.; quit; %mend;  data _null_;     set table_associations;     call execute('%max('||field||','||table||')'); run;

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