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https://issues.apache.org/jira/browse/HADOOP-2006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12532944
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udanax edited comment on HADOOP-2006 at 10/6/07 7:19 PM:
--------------------------------------------------------------
{code}
SELECT { column_name [, column_name] ... | * | expr[alias] }
FROM table_name
[WHERE selection_condition]
[GROUP BY expr [,expr] ...]
[ORDER BY {expr|position}
[ASC|DESC][,expr|position}[ASC|DESC]
[NUM_VERSIONS = version_count]
[TIMESTAMP 'timestamp']
[LIMIT = row_count]
[INTO FILE 'file_name']
{code}
was (Author: udanax):
SELECT { column_name [, column_name] ... | * | expr[alias] }
FROM table_name
[WHERE selection_condition]
[GROUP BY expr [,expr] ...]
[ORDER BY {expr|position}
[ASC|DESC][,expr|position}[ASC|DESC]
[NUM_VERSIONS = version_count]
[TIMESTAMP 'timestamp']
[LIMIT = row_count]
[INTO FILE 'file_name']
> Aggregate Functions in select statement
> ---------------------------------------
>
> Key: HADOOP-2006
> URL: https://issues.apache.org/jira/browse/HADOOP-2006
> Project: Hadoop
> Issue Type: Sub-task
> Components: contrib/hbase
> Affects Versions: 0.14.1
> Reporter: Edward Yoon
> Priority: Minor
> Fix For: 0.16.0
>
>
> Aggregation functions on collections of data values: average, minimum,
> maximum, sum, count.
> Group rows by value of an columnfamily and apply aggregate function
> independently to each group of rows.
> * <Grouping columnfamilies> ƒ ~function_list~ (Relation)
> {code}
> select producer, avg(year) from movieLog_table group by producer
> {code}
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