Computer Science

Assertion. A data table can have only one primary key.
Reason. In a data table, there can be only one attribute/field containing unique values for each row.

Relational Database

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Answer

(c)

Assertion is true but Reason is false.

Explanation
A data table can have only one primary key. There can be more than one attribute in a relation possessing the unique identification property. They are known as candidate keys.

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Computer Science

Assertion. A data table can have only one primary key.
Reason. In a data table, there can be only one attribute/field containing unique values for each row.

Relational Database

Answer

Related Questions

Assertion. Data redundancy may lead to many problems.
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Assertion. A primary key is used to uniquely identify the rows in a data table.
Reason. A primary key is a field or attribute which has a unique value for each row or tuple.

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Computer Science

Assertion. A data table can have only one primary key.Reason. In a data table, there can be only one attribute/field containing unique values for each row.

Relational Database

Answer

Related Questions

Assertion. Data redundancy may lead to many problems.Reason. In RDBMS, data redundancy is 100% removed.

Assertion. A primary key is used to uniquely identify the rows in a data table.Reason. A primary key is a field or attribute which has a unique value for each row or tuple.

Assertion. There can be multiple options for choosing a primary key in a data table.Reason. All attribute combinations inside a data table that contain unique values for each row, are the candidate keys.

Assertion. All types of keys contain unique values for each row.Reason. A foreign-key attribute of a table is the primary key of another table.

Assertion. A data table can have only one primary key.
Reason. In a data table, there can be only one attribute/field containing unique values for each row.

Assertion. Data redundancy may lead to many problems.
Reason. In RDBMS, data redundancy is 100% removed.

Assertion. A primary key is used to uniquely identify the rows in a data table.
Reason. A primary key is a field or attribute which has a unique value for each row or tuple.

Assertion. There can be multiple options for choosing a primary key in a data table.
Reason. All attribute combinations inside a data table that contain unique values for each row, are the candidate keys.

Assertion. All types of keys contain unique values for each row.
Reason. A foreign-key attribute of a table is the primary key of another table.