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The minimal set of super key is called _

WebAug 28, 2024 · Following are the examples of a super key for the table Student: 1. Student_id 2. (Student_id, Name) 3. (Name, Department_id) Candidate key. A minimal (minimum) set of attributes that can uniquely identify each record in a relation is called a candidate key. It is a subset of a super key. WebFeb 11, 2014 · Minimal Super key is a key which is a super key without any redundant attribute (unnecessary combination). In other words, if you remove any attribute from a key combination, it should not be able to uniquely identify data. That is we need a minimal combination of attributes.

A _______________ key is a minimal superkey - Database

WebThe minimal set of super key is called State true or false i) A candidate key is a minimal super key. ii) A candidate key can also refer to as surrogate key. Minimal data … WebA minimal super key is called as a candidate key. For any given relation, It is possible to have multiple candidate keys. There exists no general formula to find the total number of … boy toys 6-8 year old https://thebankbcn.com

[Solved] Minimal data redundancy means improved - McqMate

WebAug 22, 2024 · a) A Super Key is a set of one or more attributes that, taken collectively, allows us to uniquely identify an entity in the entity set. b) A proper subset of a candidate key is called a Super Key. c) The minimal set of attributes that allows us to uniquely identify an entity in the entity set is called a candidate key. WebMar 19, 2016 · Althrough, minimal subset of super key is either id or ssn. but both of them can be considered as candidate key. Primary Key : Primary key is a one of the candidate key. Example : Student(Id, Name, Dept, Result) … WebFeb 27, 2024 · Any superset of a key (primary key or candidate key) is a superkey. Data: n → total number of attributes = 5 n (s) → total number of super keys n (CD) → number of super keys when CD as the key n (E) → number of super keys when E as the key Formula: n (S) = n (CD ∪ E) = n (CD) + n (E) – n (CDE) Calculation: n ( S) = 2 5 − 2 + 2 5 − 1 − 2 5 − 3 gym in selly oak

What is an example of a candidate key? - TimesMojo

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The minimal set of super key is called _

NPTEL Data Base Management System Assignment 1 Answers …

WebJan 5, 2024 · It is called a minimal superkey because we select a candidate key from a set of super key such that selected candidate key is the minimum attribute required to … WebJun 18, 2024 · In relational database minimal super keys is known as -. Q3. Consider the following statements regarding key - (I) A super key is an attribute or combination of attributes that uniquely identify records in an RDBMS table. (II) A candidate key is a subset of a super key. (III) All super keys are candidate keys but vice versa is not true.

The minimal set of super key is called _

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WebVerified by Toppr Correct option is B) Minimal super-key is also called as Key. It is defined as that part of super-key from which any attribute cannot be removed without sacrificing … WebJul 1, 2024 · In other words, the minimal super key is a candidate key. Primary key: The attribute or set of attributes which uniquely identify a single row in a table is called …

WebMar 4, 2024 · All the different keys in DBMS which are not primary key are called an alternate key; A super key with no repeated attribute is called candidate key; A compound key is a key which has many fields which … WebThe minimal set of super key is called Primary key Secondary key Candidate key Foreign key. DBMS Objective type Questions and Answers. A directory of Objective Type …

WebMar 4, 2024 · Correct Answer - Option 4 : Both Candidate and Primary Key A candidate key is a minimal super key or a super key with no redundant attribute. It is called a minimal super key because we select a candidate key from a set of super keys such that the selected candidate key is the minimum attribute required to uniquely identify the table. WebMay 18, 2016 · 1 Answer. In general a (candidate) key is a set of attributes that determines all the attributes of the relation, and it is called “a minimal set” (of attributes with this property), in the sense that you cannot eliminate any attribute from it without losing the property of being a key. This is in contrast with a superkey, which determines ...

WebThe minimal set of super key is called Q. The minimal set of super key is called A. primary key: B. secondary key: C. foreign key: D. candidate key: Answer» D. candidate key View all …

WebApr 11, 2024 · A Candidate key is a subset of Super keys and devoid of unnecessary attributes that are not important for uniquely identifying tuples. For this reason, you can … boy toys 3 years oldWebThe minimal set of super key is called Minimal Superkeys are called The minimal set of super key is called State true or false i) A candidate key is a minimal super key. ii) A candidate key can also refer to as surrogate key. The operation of moving from finer- granularity data to a coarser granularity (by means of aggregation) is called a boy toys 8 disneyWebThe minimal set of super key is called. (A) Primary key. (B) Secondary key. (C) Foreign key. (D) Candidate key. Next Question». Related Multiple choice questions: computer hardware … boy toys 8 years old