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Sampling SyntaxSampling Bucketized TableBlock SamplingSampling Syntax 抽样语法Sampling Bucketized Tabletable_sample: TABLESAMPLE (BUCKET x OUT OF y [ON co... 阅读全文
posted @ 2015-01-26 12:11
JackyKen
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Subqueries in the FROM ClauseSubqueries in the WHERE ClauseSubqueries in the FROM ClauseSELECT...FROM(subquery)name...SELECT...FROM(subquery)ASname...... 阅读全文
posted @ 2015-01-26 11:42
JackyKen
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Lateral View SyntaxDescriptionExampleMultiple Lateral ViewsOuter Lateral ViewsLateral View SyntaxlateralView: LATERAL VIEW udtf(expression) tableAlias... 阅读全文
posted @ 2015-01-26 11:38
JackyKen
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Union Syntaxselect_statement UNION ALL select_statement UNION ALL select_statement ...UNION is used to combine the result from multiple SELECT stateme... 阅读全文
posted @ 2015-01-26 11:31
JackyKen
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Join OptimizationJoin OptimizationImprovements to the Hive OptimizerStar Join OptimizationStar Schema ExamplePrior Support for MAPJOINLimitations of P... 阅读全文
posted @ 2015-01-26 11:28
JackyKen
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Hive JoinsHive JoinsJoin SyntaxExamplesMapJoin RestrictionsJoin OptimizationPredicate Pushdown in Outer JoinsEnhancements in Hive Version 0.11Join Syn... 阅读全文
posted @ 2015-01-26 11:01
JackyKen
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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... 阅读全文
posted @ 2015-01-26 10:43
JackyKen
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Hive Operators and User-Defined Functions (UDFs)Hive Operators and User-Defined Functions (UDFs)Built-in OperatorsRelational OperatorsArithmetic Opera... 阅读全文
posted @ 2015-01-26 10:37
JackyKen
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Transform/Map-Reduce SyntaxSQL Standard Based Authorization Disallows TRANSFORMTRANSFORM ExamplesSchema-less Map-reduce ScriptsTyping the output of TR... 阅读全文
posted @ 2015-01-26 10:22
JackyKen
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Syntax of Order BySyntax of Sort ByDifference between Sort By and Order BySetting Types for Sort BySyntax of Cluster By and Distribute BySyntax of Ord... 阅读全文
posted @ 2015-01-26 10:17
JackyKen
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