Each row of this table is a tuple consisting of the group name and user ID.

这个表中的每一行是一个由组名和用户ID组成的二元组。

youdao

Assuming there is at least one, each instance is described in a row of the table. The instance ID and AMI ID are displayed, along with the public DNS name, security group, and key pair.

假设至少有一个实例，每个实例在一个表格行中描述，包括实例ID、A MI ID、公共dns名称、安全组和值对。

youdao

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.

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。

youdao