COMPUTER SCIENCE AND ENGINEERING
SQL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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degree
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tuple
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cardinality
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domain
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Detailed explanation-1: -The cardinality of a relationship is the number of related rows for each of the two objects in the relationship. The rows are related by the expression of the relationship; this expression usually refers to the primary and foreign keys of the underlying tables.
Detailed explanation-2: -The number of rows in the table. The number of unique values for a set of columns for leading columns in an index key, also known as cardinality.
Detailed explanation-3: -Cardinality: The number of tuples (rows) in a relation (table)
Detailed explanation-4: -In a database context, cardinality refers to the number of unique values in a relational table column relative to the total number of rows in the table. The cardinality of a column is assessed and stored in system tables for optimizer use when the database administrator (DBA) runs statistics.
Detailed explanation-5: -In a database, cardinality usually represents the relationship between the data in two different tables by highlighting how many times a specific entity occurs in comparison to another.