Using SQL group by and aggregation functions on that table is usually more efficient than producing the same result in plain XQuery.

对该表使用SQL的groupby函数和聚集函数通常比使用生成相同结果的普通XQuery更有效。

youdao

Using SQL group by and aggregation functions on that table is usually more efficient than producing the same result in plain XQuery.

对该表使用SQL的groupby函数和聚集函数通常比使用生成相同结果的普通XQuery更有效。

youdao