The FROM SQL clause defines the specific function that will be used to transform a value to a built-in data type value representing the structured type.
FROM sql子句定义了特定的函数，可以使用该函数将将一个值转换成表示结构化类型的内置数据类型。
2
Establish a structured measurement regime for the business value of your processes.
为您的流程价值建立结构化的度量体系。
3
To do that, we will invoke the observer method (using the double-dot operator) for the city attribute of the structured type value in the ADDRESS column (Listing 2).