目录引言列转行（Pivoting）示例数据转编程客栈换前查询结果列转行 SQL 语句转换后查询结果行转列（Unpivoting）示例数据转换前查询结果行转列 SQL 语句转换后查询结果引言
I\'m not thrilled with the argument-passing architecture I\'m evolving for the (many) Perl scripts that have been developed for some scripts that call various Hadoop MapReduce jobs.
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