Our lecturer started to explain definition of DATABASE and DMS (Database Management System). I didn’t know about what is DMS at all. But our lecturer gave us clear explanation and I realized that database and its fellows are very important for us. There are 4 types of physical database and another 4 of DMS. Under physical database, there are data item, relationships, constraints and schema. In relationships, there are three types of relationships. They are one to one, one to many and many to many. Under the DMS, first Define, create and organize a database, then, input data, process data, maintain data integrity and security, and query database.
Database system, it’s quite interesting for me. DMS software together with the database is called a database system. Also, we knew what database models are and that there are four types of database models. Moreover, there is a part which is difficult to understand. It’s database terminology. Under that topic, there are field which represent column of database table, record which represent row, key field which represent primary field, table which represent collection of record, relational database, and objects. And our lecturer showed us how the object relational database works out. It’s like tree or brunch system.
Our lecturer told us not to forget what data, DMS, what the 4 components is of database are and definition of relations, 3 types of relations and 4 types of database models. She taught us how to access and work with the Microsoft Access. I am happy to know how to use it. Then, she gave us in-class assignment and we did it.
Thank you.
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