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                # Spark SQL Spark SQL允許Spark執行用SQL, HiveQL或者Scala表示的關系查詢。這個模塊的核心是一個新類型的RDD-[SchemaRDD](http://spark.apache.org/docs/latest/api/scala/index.html#org.apache.spark.sql.SchemaRDD)。 SchemaRDDs由[行](http://spark.apache.org/docs/latest/api/scala/index.html#org.apache.spark.sql.package@Row:org.apache.spark.sql.catalyst.expressions.Row.type)對象組成,行對象擁有一個模式(scheme) 來描述行中每一列的數據類型。SchemaRDD與關系型數據庫中的表很相似。可以通過存在的RDD、一個[Parquet](http://parquet.io/)文件、一個JSON數據庫或者對存儲在[Apache Hive](http://hive.apache.org/)中的數據執行HiveSQL查詢中創建。 本章的所有例子都利用了Spark分布式系統中的樣本數據,可以在`spark-shell`中運行它們。 * [開始](getting-started.md) * [數據源](data-sources/README.md) * [RDDs](data-sources/rdds.md) * [parquet文件](data-sources/parquet-files.md) * [JSON數據集](data-sources/jSON-datasets.md) * [Hive表](data-sources/hive-tables.md) * [性能調優](performance-tuning.md) * [其它SQL接口](other-sql-interfaces.md) * [編寫語言集成(Language-Integrated)的相關查詢](writing-language-integrated-relational-queries.md) * [Spark SQL數據類型](spark-sql-dataType-reference.md)
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