The GROUP BY and SORT clauses in SQL allow for more structuring than the examples in this column have demonstrated, but XML node hierarchies can represent their results as well.
SQL中的GROUPBY和SORT 子句所顾及的比本专栏示例所演示的更具有结构性，但XML节点层次结构也可以表示它们的结果。
The GROUP BY and SORT clauses in SQL allow for more structuring than the examples in this column have demonstrated, but XML node hierarchies can represent their results as well.
SQL中的GROUPBY和SORT 子句所顾及的比本专栏示例所演示的更具有结构性，但XML节点层次结构也可以表示它们的结果。
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