英语句子结构、成分分析To retrieve information about the database, you use a report. A report is a procedure that extracts information in the database, formats the information with text, and sends it to an output device (usually in the printer).

这段话共有两个句子。
句子1：To retrieve information about the database，, you use a report.
该句是简单句。其中： To retrieve information about the database做目的状语；, you use a report. 的结构是：主语(you)-谓语(use)-宾语(report),即：S－V－O
句子2：A report is a procedure that extracts information in the database, formats the information with text, and sends it to an output device (usually in the printer).
该句是含有一个定语从句的复合句。
主句是：A report is a procedure。 其结构为：主语（A report)-谓语系动词(is)-表语(a procedure).
定语从句为：that extracts information in the database, formats the information with text, and sends it to an output device (usually in the printer). 修饰先行词procedure.
这个定语从句的结构为：主语（that）-并列谓语（extracts,formats and sends）- 宾语（information,the information,it,分别作extracts,formats and sends的宾语）。其中的 in the database，with text，to an output device (usually in the printer). 作状语

To retrieve information about the database作目的状语you use a report是主句。A report is a procedure 是另一个主句that extracts information in the database,formats the information with text, and sends it to an output device (usually in the printer).三个并列动词短语是procedure 的定语

【To retrieve information about the database目的状语】,you use a report（主谓宾结构）.A report（主）is（系）a procedure（表）【that extracts（从句第一个谓语）information in the database,formats（从句...