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Terms in this set (20)What is a primary key? a field (or group of fields) that uniquely identifies a given entity in a table Which of the following illustrates the primary concepts of the relational database model? entities, attributes, keys, and relationships Which of the following stores information about a person, place, thing, transaction, or event, and is usually referred to as a table? entity What is the role of a foreign key? It is a primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables. What is the primary problem with redundant information? It is difficult to determine which values are the most current., It is often inconsistent, It is difficult to determine which values are the most accurate. What are rules that enforce basic and fundamental information-based constraints? relational integrity constraint What is one of the biggest pitfalls associated with real-time information? It continually changes Which of the following lists include all of the five characteristics common to high-quality information? accuracy, completeness, consistency, timeliness, and uniqueness What compiles all of the metadata about the data elements in the data model? data dictionary Which of the following is true in regard to the elimination of redundant information? improves information quality What is a technique for documenting the entities and relationships in a database environment? entity-relationship diagram What is a collection of related data elements? record What expresses the specific number of instances in an entity? cardinality What occurs between two entities in which an instance of one entity can be related to many instances of a related entity? one-to-many relationship What is a characteristic of a table? field What is composed of rows and columns that represent an entity? Table What is a primary key? a field that uniquely identifies a given record in a table What is a foreign key? a primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables What occurs between two entities in which an instance of one entity can be related to only one instance of a related entity? one-to-one relationship What occurs when two entities can be related to each other in many instances? many-to-many relationship Recommended textbook solutions Computer Organization and Design MIPS Edition: The Hardware/Software Interface5th EditionDavid A. Patterson, John L. Hennessy 220 solutions
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What is primary key in relational DBMS quizlet?A primary key is a field in a table which is unique and enables you to identify every record in that table.
What is an example of a relational database quizlet?For example, SQLite is a relational database management system. SQLite contains the most minimal set of SQL commands which are the same across all RDBMSs.
What is a relational database quizlet?Relational Database. A database consisting of more than two related tables. The relationship between the tables is created by placing a primary key of the primary in to the secondary table. Database Tables.
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Which of the following illustrates the primary concepts of the relational database model quizlet?
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