[Hadoop Wiki] Update of "Hive/LanguageManual/Select" by ZhengShao

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The following page has been changed by ZhengShao:
http://wiki.apache.org/hadoop/Hive/LanguageManual/Select

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  SELECT * FROM sales SORT BY amount DESC LIMIT 5
  }}}
  
+  * A SELECT statement can take regex-based column specification.
+  * We use java regex syntax. Try http://www.fileformat.info/tool/regex.htm for testing purposes.
+  * The following query select all columns except ds and hr.
+ {{{
+ SELECT `(ds|hr)?+.+` FROM sales
+ }}}
+