Columns surrounded by quotation marks and prefixed with the "t" variable are based on XML element values, as the subsequent lines of the query indicate.
查询中后面的几行表明，用引号括起来、并且以变量“t ”为前缀的列是基于XML元素值的列。
Columns surrounded by quotation marks and prefixed with the "t" variable are based on XML element values, as the subsequent lines of the query indicate.
查询中后面的几行表明，用引号括起来、并且以变量“t ”为前缀的列是基于XML元素值的列。
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