The following SAS program is submitted:

  proc contents data=TESTDATA.ONE;      
  run;

  Which SQL procedure step produces     
  similar information about the column  
  attributes of TESTDATA.ONE?  
A.
proc sql;   
   contents from TESTDATA.ONE;
quit;

B.
proc sql;   
   describe from TESTDATA.ONE;
quit;

C.
proc sql;   
   contents table TESTDATA.ONE;
quit;

D.
proc sql;   
   describe table TESTDATA.ONE;
quit;  
答案及详细解答请参见：http://crackman.net/?p=426