Put the answer if you are 100% sure of the answer, otherwise no  To transform a relation from 1st NF to 2nd NF we must remove which of the following?   All partial-key dependencies   All inverse partial-key dependencies   All repeating groups   All transitive dependencies         Al the following are integrity constraints, EXCEPT:   Primary Key   Distinct   Unique   Check   How many cases there are for creating a DB trigger based on the time and the event of the Trigger ?   Three Cases   Four Cases   Five Cases   Six Cases

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…

Q: Consider the relation schema R (A, B, C, D, E). Find number of super keys if A, CD and BE are the…

A:

Q: Explanation of three cases when it makes sense to create a secondary key instead of the main one in…

A: The three cases when it makes more sense to create a secondary key instead of using the main key in…

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: database relation R into relations R₁ and R₂, we want R₂ MR₂R so that no tuples in R is lost. This…

A: In other words, lossless decomposition is a way of normalizing a database by breaking down a large…

Q: This question is based on the following relation and sample data, where Employee Social Security…

A: Actually, database is a used to stored the data.

Q: What are three advantages of using a surrogate key rather than the main key to access a relation…

A: A surrogate key is a one of a type of identifier for a record or item in the table. It is comparable…

Q: Using this unnormalized table and the five functional dependencies and third normal forms. In other…

A: To find the normal forms for the given functional dependencies, we need to check each normal form…

Q: Assume a user establishes a new relation r1 that contains a foreign key that points to another…

A: The question is related to database foreign key.

Q: 2 Consider the following functional dependencies for the given relation. R={A, B, C, D, E, F) AB->CD…

A: Dear Student, The answer to your question is given below -

Q: Describe three scenarios when a surrogate key should replace a relation's primary key.

A: requirements for suggesting a substitute key Three circumstances indicate that a relation's primary…

Q: Table_1 below has a primary key of column1. Which column(s) from this relation could be a foreign…

A: When designing a relational database, it is important to determine which columns could act as…

Q: Based on the following functional dependencies, for the relation SCHEDULE bring it into a set of…

A: To bring the relation SCHEDULE into a set of 3NF relations, we need to identify the functional…

Q: Consider the scenario below: A user creates a new relation r1 with a foreign key referencing another…

A: Relational databases are designed to manage complex data structures efficiently. These structures…

Q: The following functional dependencies describe a relation that is in 2NF. Customer_ID, Store_ID ->…

A: Definition of 2NF is => There should not be any partial dependency. Partial Dependency means Part…

Q: What are three reasons why the main key of a relation need to be replaced with a surrogate key?

A: substitute key: It is a key that has no contextual significance but is utilised in data analysis to…

Q: Consider a relation (A, B, C, D, E, F, G) with functional dependencies as given below: ABC D ED-F…

A: Consider the following relation with set of functional dependencies: R (A, B, C, D, E, F, G)…

Q: We have the following relation: Subscriptions(ID, startingdate, length, customerID, customerName,…

A:

Q: Indicate all the functional dependencies and the normal form for each relation

A: The functional dependencies are the unique relationships between the attributes. For the table given…

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: All lower case Underscore separator between root and suffix Foreign keys have the same name as…

Q: What are three signs that a surrogate key should be generated for the primary key of a relation…

A: A surrogate key is one that serves no practical or operational purpose. It's "artificial" and made…

Q: True or False: Every primary key of a relation is a superkey    No hand written and fast answer…

A: The solution is given below for the above given question:

Q: hich of the following functional dependencies are satisfied (and not satisfied) by this relation and…

A: functional dependency in DBMS.

Q: PLZ help with the following: IN SQL Let R (A, B, C) be a relation schema. What happens if we…

A: Relational schema refers to the meta-data that describes the structure of data within a…

Q: as-is dependency diagram and identify types of dependencies. Is this table 3rd normal form? If not,…

A:

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: There is only one error in the above code and that is the ALTER TABLE command on the address table.…

Q: SQL allows a foreign-key dependency to refer to the same relation, as in the following example:…

A: The given SQL query state that there is given below :

Q: Given the relation R(A, B, C, D, E, F), the following functional dependencies exist: B --> C, D D…

A: Given : R(A, B, C, D, E, F) B --> C, DD --> F

Q: Which of the following functional dependencies are satisfied (and not satisfied) by this relation…

A: (a) A → B False why ?? because you can't able to identify the value of B uniquely using A because…

Q: Here is a table representing a relation named K ABC 012 345 678 Identify: 1. The attributes of R. 2.…

A: The question is asking which of the given statements is NOT true about relation R.

Q: Consider a relation (p, q, r, s, t, u, v) with functional dependencies as given below: p➜q r➜s,t…

A: Given : A relation (p, q, r, s, t, u, v) with functional dependencies as given below:p ⇒ qr ⇒ s, ts…

Q: As an example, suppose a user creates a new relation r1 with a foreign key pointing to another…

A: Introduction: A foreign key is like a column or set of columns in one table whose values match the…

Q: Consider the following relation for student records: GRADEREPORT(Student|D, StudentName,…

A: The relation is in 1NF because: Domain for attributes does not change. Every column/attribute has a…

Q: What is the highest normal form for the following relation and its functional dependencies? Assume…

A: A(x , w ,z) x->w functional dependency  is a relationship between two attributes, typically…

Q: Below are three situations where a surrogate key could replace the relation's primary key.

A: - We need to talk about three situations where a surrogate key can replace a relations primary key.

Q: For developing our queries, we will be using the following relational schema: Student(SID, name,…

A: Q1.  Here we need to join relation Course and Offering and use selection operator to select only…

Q: Write SQL code for the following design schema of three tables. The tables should have the following…

A: - We need to design three tables with the requirements of constraints as provided.

Q: Implement a new independent entity phone in the Sakila database. Attributes and relationships are…

A: SQL: Database management is done using a programming language called SQL, or Structured Query…

Q: Normalise the following relation to remove modification anomalies showing all steps for 1NF, 2NF and…

A:

Q: EmpID and OrderlD are unique identifiers. An employee may have more than one certificate.…

A: The given problem is related to relational database modeling where an Entity Relationship diagram is…

Q: For 1 through 4, state whether the statements are True or False (Do not provide any explanation or…

A: This question is a simple true and false question in which we have to state either true or false and…

Q: en the candida

A: Solution - In the given question, we have to discuss the differences between the candidate keys and…

Q: Assume a user creates a new relation r1 with a foreign key pointing to another relation r2. What…

A: If a user creates a new relation r1 with a foreign key pointing to another relation r2, the user…

Q: The following figure shows a DB state for å library system. Indicate the violations on each…

A: Hi Let's first analyze each table. Client table    Address has 2 elements in  1 cell.  E    CID is…

Q: Please help with the folllowing: Consider the following declaration of a relation schema…

A: QI:  Insert INTO R (B, C) Values (353, 'B');  Screenshot of SQL program for the above insertion…

Q: Assume that the following graph represents a relation. Which of the following is true about the…

A: given the following graph represent a relation which of the following is true.

Fundamentals of Datawarehouse

A data warehouse is a data repository which is used to store large quantities of historical data that are mostly used for creating reports that help businesses to identify their weaknesses and strengths. For example, demographics data about people of a region can help businesses identify the needs and preferences of the region’s population. A data warehouse acts as a central storage for storing data that comes from one or more heterogenous sources. It also consists of data which can be old and of historical value. One of the most important applications of this type of system is that it is used for supporting business intelligence and data analytics applications.