{"id":2483,"date":"2016-03-07T07:00:46","date_gmt":"2016-03-07T05:00:46","guid":{"rendered":"http:\/\/blue.pri.ee\/ttu\/?page_id=2483"},"modified":"2026-03-25T17:08:58","modified_gmt":"2026-03-25T15:08:58","slug":"homework-ii","status":"publish","type":"page","link":"https:\/\/blue.pri.ee\/ttu\/programming-ii\/homework-ii\/","title":{"rendered":"Homework II"},"content":{"rendered":"
<\/span>Explanations about keys (PK \/ FK)<\/div>
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PK (primary key) – Unique field or a group of fields in a table or a file that identifies a record (row in a file). Typically an integer or UUID is used, but it can be any value that is unique. One file or table can only have a single primary key. Each file or table has to have a primary key.<\/p>\n

FK (foreign key) – this is used to create relations to other tables or files. If a foreign key matches the primary key in another file or table, then these items are related to each other. One file or table can have multiple foreign keys and they’re not unique (can repeat).<\/p>\n

Foreign key and primary key form a relation between two files or database tables.<\/p>\n

E.g. one person can have multiple children; one receipt can have multiple products; one student can have multiple subject declarations; One person can own multiple properties; <\/div><\/div>\n

For homework II, you have to write a program based on the set requirements and document the work. The focus of this homework is implement dynamic memory allocation for data storage and writing a large, complex program.<\/p>\n

This homework task is larger and more complex than any of the homework tasks before. Plan your time accordingly!<\/strong><\/p>\n

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