hdcg@cie.unam.mx User Feedback Pg host=mazatl.cie.unam.mx dbname=webcie webcie UPDATE usercalif SET freq=freq+1, sum=sum+, sum2=sum2+^2 WHERE uri=''

CHECKPOINT 2

$rv=$rv

if ($rv != 1) {

CHECKPOINT 3

 INSERT INTO usercalif VALUES('',1,,^2)

CHECKPOINT 4

 } SELECT uri, freq, sum, sum2, TO_CHAR(1.0*sum/freq, '0.00') AS avg, TO_CHAR(sqrt(1.0*sum2/freq-(1.0*sum/freq)^2), '0.00') AS sdev FROM usercalif WHERE uri='';

Gracias por su participación

  • Página:
  • Freq:
  • Sum:
  • Sum2:
  • Promedio:
  • sdev:
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