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11.至少有5名直接下属的经理 需求:Employee 表,请编写一个SQL查询来查找至少有5名直接下属的经理。 结果展示: Name John 建表语句: Create table If Not Exists Employee (Id int, Name varchar(255), Departm 阅读全文
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BroadCast TimeOut 300. org.apache.spark.SparkException: Could not execute broadcast in 300 secs. You can increase the timeout for broadcasts via spark 阅读全文
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Catelog Table Catlog is essentially an HBase table and just like other table but is filled out of the HBase Shell's list command . Hbase: meta Hbase:m 阅读全文
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10.员工薪水中位数 需求:请编写SQL查询来查找每个公司的薪水中位数 结果展示: Id Company Salary 5 A 451 6 A 513 12 B 234 9 B 1154 14 C 2645 建表语句: Create table If Not Exists Employee (Id 阅读全文
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MemStore 详解 Store A Store hosts a MemStore and 0 or more StoreFiles (HFiles). A Store corresponds to a column family for a table for a given region. 多 阅读全文