If you assume that a relation has no duplicate data, how do you know there is always at least one primary key?
Q: What are three indications that a surrogate key should be constructed for the primary key of a…
A: Surrogate key is unique key and also called as synthetic primary key. Surrogate key holds anonymous…
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Q: In mathematical term Table is referred as a. Relation b. Attribute c. Tuple d. Domain
A: In mathematical term Table is referred as a. Relation b. Attribute c. Tuple d. Domain
Q: List three conditions that suggest a surrogate key should be created for the primary key of a…
A: To be determine: List three conditions that suggest a surrogate key should be created for the…
Q: How relation listening important?
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Q: List all functional dependencies satisfied by the relation shown in the figure. Q R 1 3 4 2 4 5 1 3…
A: the only functional dependency available in this given relation is
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A:
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A: Hybrid merge join algorithm is a version of the merge join procedure, which is done on unsorted…
Q: Under what circumstances can an attribute of a relation be of variable length?
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Q: Explain references the primary key in the same relation?
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Q: In mathematical term Row is referred as a. Relation b. Attribute c. Tuple d. Domain
A: In SQL and other relationship databases,
Q: Computer science Explain how the primary key in the same relation is referenced.
A: Introduction: The primary key constraint requires that each row in the relational database…
Q: Under what circumstances can a relation have duplicate rows?
A: GIVEN: Under what circumstances can a relation have duplicate rows?
Q: Define the term Well-structured relation?
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Q: In what normal form is the LOTS relation schema in the Figure with respect to the restrictive…
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Q: Indicate all the functional dependencies and the normal form for each relation
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Q: 2. What is the minimum level of normal form for a relation with only one non- prime attribute?
A: 1NF
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A: Start: A connection is the same thing as a table with two dimensions. It includes a certain…
Q: What are three criteria that indicate that a surrogate key for a relation's main key should be…
A: Surrogate key: It is a key that does not have any contextual meaning but is used to identify the…
Q: Give an example of a relation with a unique composite key
A: A unique key is one that identifies a row in a relation uniquely. The unique key may be combination…
Q: cher(ID, name, S ary key of the re ary of the relatic relation is 300 a maximum size
A:
Q: Indicate all the functional dependencies and the normal form for each relation. Decompose your…
A: Indicate all the functional dependencies and the normal form for each relation. Decomposeyour…
Q: rence relation is defined as 1
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A: Solution:- Step 1The ask is to normalize the given data set and derive the 1NF, 2NF and 3NF.
Q: The number of tuples in a relation is referred to as
A: We are given a question related to DBMS and we have to complete the given statement. The question is…
Q: Let's say a user establishes a new relation r1 that has a foreign key that points to another…
A: Introduction: A foreign key (FK) is like a column or collection of columns that is used to create…
Q: A relation that has no transitive dependencies is in __________ normal form.
A: Normalization in DMBS : In designing the database, there is a requirement to remove all the types…
Q: Suppose a relation contains partial dependencies. At most, what normal form would it be? Select one:…
A: The correct answer is
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A: Here in this question we have given three realtion and we have asked to find the range and domain of…
Q: w many partial dependencies exist in the relation? v many full dependencies exist in the relation? w…
A: 1) Closure (AE) ={A, E, B, C, D, F, G} Closure (AEI) ={A, E, I, B, C, D, F, G, H, J, K, L} Key for…
Q: :When the primary key is not a composite key, the relation is said to be in at least fifth normal…
A: Lets see the solution.
Q: What is the relationship between the primary key of a relation and the functional dependencies among…
A: The fundamental rule of normalization says that each of the non-key attributes should be completely…
Q: In the figure below, STUDENT relation has a composite primary key contains Stud_ID and Course_ID.…
A: The Answer is in Below Steps
Q: A relation that has no partial functional dependencies is in ___________ normal form.
A: Given: A relation that has no partial functional dependencies is in ___________ normal form.…
Q: Given these potential problems, what general conditions influence when to partition a relation…
A: Answer: Issues of vertical partitioning Vertical Partitioning: The separation of the logical…
Q: Assume a user creates a new relation r1 with a foreign key that links to another relation r2. What…
A: Introduction: A FOREIGN KEY is like a field (or set of fields) in one database that refers to the…
Q: What is the link between the main key of a relation and the functional connections between all of…
A: Introduction: Primary and foreign keys are the cornerstones of relational database theory. Primary…
Q: TF (c) If a relation is not in BCNF, then it has at least three attributes in the schema.
A: If a relation is not in BCNF, then it has at least three attributes in the schema.
Q: Informally describe the conditions to be met for a relation to be in Second Normal Form. In terms of…
A: Second Normal Form, it must satisfy two conditions: The table should be in the First Normal Form.…
If you assume that a relation has no duplicate data, how do you know there is always at least one primary key?
Step by step
Solved in 2 steps
- What is an unnormalized relation? Is it a relation according to the definition of the word relation?When should you use a surrogate key instead of the primary key in a relation, and give three examples?In what three cases would it be preferable to use a foreign key instead of the primary key in a relation?