[Pig Wiki] Update of "PigTutorial" by terrell

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The following page has been changed by terrell:
http://wiki.apache.org/pig/PigTutorial

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   * Because the log file only contains queries for a single day, we are only interested in the hour. The excite query log timestamp format is YYMMDDHHMMSS. Call the !ExtractHour UDF to extract the hour (HH) from the time field.
  {{{ 
- houred = FOREACH clean3 GENERATE user, org.apache.pig.tutorial.ExtractHour(time) as hour, query;
+ houred = FOREACH clean2 GENERATE user, org.apache.pig.tutorial.ExtractHour(time) as hour, query;
  }}}
  
   * Call the N!GramGenerator UDF to compose the n-grams of the query.
@@ -214, +214 @@

   
   * Because the log file only contains queries for a single day, we are only interested in the hour. The excite query log timestamp format is YYMMDDHHMMSS. Call the !ExtractHour UDF to extract the hour from the time field.
  {{{
- houred = FOREACH clean3 GENERATE user, org.apache.pig.tutorial.ExtractHour(time) as hour, query;
+ houred = FOREACH clean2 GENERATE user, org.apache.pig.tutorial.ExtractHour(time) as hour, query;
  }}}