摘要：
Datasets are a strictly Java Virtual Machine (JVM) language feature that work only with Scala and Java. Using Datasets, you can define the object that 阅读全文
摘要：
What Is SQL? Big Data and SQL: Apache Hive Big Data and SQL: Spark SQL The power of Spark SQL derives from several key facts: SQL analysts can now tak 阅读全文
摘要：
Spark Core DataSource: CSV JSON Parquet ORC JDBC/ODBC connections Plain text files The Structure of the Data Sources API Read API Structure The core s 阅读全文