Union Syntaxselect_statement UNION ALL select_statement UNION ALL select_statement ...UNION is used to combine the result from multiple SELECT stateme...
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其他好文 时间:
2015-01-26 13:28:53
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Hive Concurrency ModelHive Concurrency ModelUse CasesTurn Off ConcurrencyDebuggingConfigurationLocking in Hive TransactionsUse CasesConcurrency suppor...
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其他好文 时间:
2015-01-26 13:23:37
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LanguageManual WindowingAndAnalyticsSkip to end of metadataAdded byLefty Leverenz, last edited byLefty Leverenzon Aug 01, 2014(view change)show commen...
Subqueries in the FROM ClauseSubqueries in the WHERE ClauseSubqueries in the FROM ClauseSELECT...FROM(subquery)name...SELECT...FROM(subquery)ASname......
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其他好文 时间:
2015-01-26 13:18:54
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EXPLAIN SyntaxEXPLAIN SyntaxHive provides anEXPLAINcommand that shows the execution plan for a query. The syntax for this statement is as follows:EXPL...
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其他好文 时间:
2015-01-26 13:16:50
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Lateral View SyntaxDescriptionExampleMultiple Lateral ViewsOuter Lateral ViewsLateral View SyntaxlateralView: LATERAL VIEW udtf(expression) tableAlias...
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其他好文 时间:
2015-01-26 13:13:59
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Documentation for Built-In User-Defined Functions Related To XPathUDFsxpath, xpath_short, xpath_int, xpath_long, xpath_float, xpath_double, xpath_numb...
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2015-01-26 11:43:03
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编程过程中发现错误,无法看到具体的错误信息,网上搜了下,按照下面的方法启动Hive Shell就可以打开调试(注意:此方法只对本次回话有效):hive --hiveconf hive.root.logger=DEBUG,console如果需要对所有会话有效,则可以修改Hive的配置文件。不过不建.....
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2015-01-26 11:42:31
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Hive JoinsHive JoinsJoin SyntaxExamplesMapJoin RestrictionsJoin OptimizationPredicate Pushdown in Outer JoinsEnhancements in Hive Version 0.11Join Syn...
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2015-01-26 11:39:17
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Transform/Map-Reduce SyntaxSQL Standard Based Authorization Disallows TRANSFORMTRANSFORM ExamplesSchema-less Map-reduce ScriptsTyping the output of TR...
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其他好文 时间:
2015-01-26 11:36:05
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384