本实验室已经对这三种支持的托管提供程序进行了内部性能测试，我们在不同行数中测试了大小不同的两行的数据检索。

The lab has done internal performance testing of the three supported managed providers where we tested data retrieval of two different row sizes with varying number of rows.

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请注意，在查询10中多获得了一行，这是因为SQL的group by函数还为null值生成一个组，我们的示例表中有一名员工没有办公室信息。

Note that we get an extra row from Query 10, because SQL's group by also produces a group for NULL values, and there is one employee in our sample table with no office information.

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在18 - 20个月的治疗中，行心脏核素检查3次，以评价左室功能和容积。

After 18-20 months therapy, heart ECT were examined 3 times to evaluate the left ventricle function and volume.

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