sequence number in a result

<div class="Section1"><p class="MsoNormal">Say I have the following SQL statement:<p class="MsoNormal"> <p
class="MsoNormal">SELECTa, b, c FROM t1 ORDER BY a;<p class="MsoNormal"> <p class="MsoNormal">Is there a function or
specialsystem label I can use that would generate a sequence number in the returning result set?<p
class="MsoNormal"> <pclass="MsoNormal">Example:<p class="MsoNormal">SELECT a, b, c, SOMELABEL as order FROM t1 ORDER BY
a;<pclass="MsoNormal"> <p class="MsoNormal">Result:<p class="MsoNormal">a    b     c   order<p
class="MsoNormal">---------------------<pclass="MsoNormal">Aa  bb  cc  1<p class="MsoNormal">A1  bb  cc  2<p
class="MsoNormal">A2 bb  cc  3<p class="MsoNormal"> <p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">Thanks,</span><pclass="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span><pclass="MsoNormal"><span
style="font-size:10.0pt;font-family:"Arial","sans-serif"">LanceCampbell</span><span
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style="font-size:10.0pt;font-family:"Arial","sans-serif"">ProjectManager/Software Architect</span><p
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Affairs</span><pclass="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">University of
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