m16 - referencing files and setting options - summary.mht

sas的考试样题

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    <TD><FONT color=3Dteal><A=20
      onmouseover=3D"window.status=3D'Display details on the OPTIONS =
statement.'; "=20
      onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
      =
href=3D"http://www.sas.com/apps/OLTRN/59080/m16/m16_3.htm"><STRONG>LIBNAM=
E</STRONG>=20
      <EM>libref</EM>=20
      =
<STRONG>'</STRONG><EM>SAS-data-library</EM><STRONG>';</STRONG></A></FONT>=
</TD></TR>
  <TR>
    <TD><FONT color=3Dteal><NOBR><A=20
      onmouseover=3D"window.status=3D'Display details on the OPTIONS =
statement.'; "=20
      onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
      =
href=3D"http://www.sas.com/apps/OLTRN/59080/m16/m16_7.htm"><STRONG>LIBNAM=
E</STRONG>=20
      <EM>libref engine</EM>=20
      =
<STRONG>'</STRONG><EM>SAS-data-library</EM><STRONG>';</STRONG></A></NOBR>=
</FONT></TD></TR>
  <TR>
    <TD><FONT color=3Dteal><A=20
      onmouseover=3D"window.status=3D'Display details on the OPTIONS =
statement.'; "=20
      onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
      =
href=3D"http://www.sas.com/apps/OLTRN/59080/m16/m16_20.htm"><STRONG>OPTIO=
NS</STRONG>=20
      <EM>options</EM><STRONG>;</STRONG></A></FONT></TD></TR>
  <TR>
    <TD><FONT color=3Dteal><A=20
      onmouseover=3D"window.status=3D'Display details on the CONTENTS =
procedure.';"=20
      onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
      =
href=3D"http://www.sas.com/apps/OLTRN/59080/m16/m16_11.htm"><STRONG>PROC =

      CONTENTS DATA=3D</STRONG> <EM>libref</EM><STRONG>._ALL_=20
      NODS;</STRONG></A></FONT></TD></TR>
  <TR>
    <TD><FONT color=3D#003399><A=20
      onmouseover=3D"window.status=3D'Display details on the DATASETS =
procedure.';"=20
      onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
      =
href=3D"http://www.sas.com/apps/OLTRN/59080/m16/m16_12.htm"><STRONG>PROC =

      DATASETS;</STRONG></A></FONT></TD></TR>
  <TR>
    <TD><FONT =
color=3D#003399>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<A=20
      onmouseover=3D"window.status=3D'Display details on the DATASETS =
procedure.';"=20
      onclick=3DsuggestBack() onmouseout=3D"window.status=3D''"=20
      =
href=3D"http://www.sas.com/apps/OLTRN/59080/m16/m16_12.htm"><STRONG>CONTE=
NTS=20
      DATA=3D</STRONG><EM>libref</EM>.<STRONG>_ALL_ NODS;=20
  </STRONG></A></FONT></TD></TR>
  <TR>
    <TD><FONT color=3D#003399>QUIT;</FONT></TD></TR></TBODY></TABLE>
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    <TD align=3Dleft><STRONG><A name=3DSample>Sample =
Program</A></STRONG> <PRE><FONT color=3Dteal>     <FONT =
color=3D#003399>options pagesize=3D54 linesize=3D76 pageno=3D10 =
</FONT></FONT>
<FONT color=3D#003399>             yearcutoff=3D1925;</FONT>
<FONT color=3D#003399>     libname acctqtr3 =
'd:\users\qtr\reports';</FONT>
<FONT color=3D#003399>     proc contents data=3Dacctqtr3._all_ =
nods;</FONT>
<FONT color=3D#003399>     run;
     proc datasets;
        contents data=3Dacctqtr3._all_ nods;
     quit;
     options firstobs=3D50;</FONT>
<FONT color=3D#003399>     proc print =
data=3Dacctqtr3.sales(obs=3D100);</FONT>
<FONT color=3D#003399>     run;</FONT>
<FONT color=3D#003399>     libname rptdata spss =
'g:\patients\reports.dat';</FONT>
<FONT color=3D#003399>     proc print =
data=3Drptdata.new_tests(firstobs=3D100 obs=3D500);</FONT>
<FONT color=3D#003399>     run;</FONT>
</PRE>
      <P>
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    <TD align=3Dleft><STRONG><A name=3DPoints>Points to =
Remember</A></STRONG>=20
      <UL>
        <LI>LIBNAME and OPTIONS statements remain in effect for the =
current SAS=20
        session only.<BR><BR>
        <LI>When you use SAS windows to specify librefs or system =
options, you=20
        cannot store the specifications in your SAS programs as you can =
when you=20
        use the LIBNAME and OPTIONS statements.<BR><BR>
        <LI>When you work with date values,=20
        <UL>
          <LI>check the default value of the YEARCUTOFF=3D system option =
and=20
          change it if necessary=20
          <LI>specify the proper informat for reading a date value or =
the proper=20
          format for writing a date value=20
          <LI>specify the correct field width so that the entire date =
value is=20
          read or written. =
</LI></UL></LI></UL></TD></TR></TBODY></TABLE><!-- InstanceEndEditable =
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