Databases - Chapter 9

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In this chapter on databases, we covered essential terminology and concepts. Databases are organized collections of data, comprising fields (individual data items) and records (collections of fields). Fields contain data of the same type, and each field has a field name. Records encompass related data, like a student's information. Database files organize records, often into tables. A database management system (DBMS) is crucial for managing data efficiently.

Key terms include primary key (a unique identifier), DBMS (software for managing databases), and data types (e.g., integer, real, text). SQL (Structured Query Language) is vital for querying databases. Commands like SELECT retrieve specific data, WHERE filters results based on conditions, and ORDER BY arranges data. Functions like SUM and COUNT perform calculations and count records, respectively.

Understanding database fundamentals facilitates tasks like identifying primary keys and writing SQL queries. Practice enhances proficiency and helps score well on assessments.





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