bcnf

In the context of relational database normalization, which of the following statements is/ are true?

Consider a relational schema team (name, city, owner), with functional dependencies {name → city, name → owner}. The relation team is decomposed into two relations, t1(name, city)...

Consider a relational schema team(name, city, owner), with functional dependencies \{name $\rightarrow$ city, name $\rightarrow$ owner}. The relation team is decomposed into two re...

In a relational data model, which one of the following statements is TRUE?

Consider a relational table R that is in 3NF, but not in BCNF. Which one of the following statements is TRUE?

Let the set of functional dependencies F = {QR → S, R → P, S → Q} hold on a relation schema X = (PQRS). X is not in BCNF. Suppose X is decomposed into two schemas Y and Z, where Y...

Given the following two statements: $$S1:$$ Every table with two single-valued attributes is in $$1NF, 2NF, 3NF$$ and $$BCNF.$$ $$S2:$$ $$AB \to C,\,\,D \to E,\,\,E \to C$$ is a mi...

Which of the following is TRUE?

Consider the following relational schemes for a library database. Book ( Title, Author, Catalog_ no, Publisher, Year, Pr ice ) Collection ( Title, Author, Catalog no ) With in the...

Which one of the following statements if FALSE?

Which one of the following statements about normal forms is FALSE?

The relation scheme student Performance (Name, CourseNo, RollNo, Grade) has the following functional dependencies: Name, courseNo $$\,\, \to \,\,$$ grade RollNo, courseNo $$\,\, \t...

Relation $$R$$ with an associated set of functional dependencies, $$F,$$ is decomposed into $$BCNF.$$ The redundancy (arising out of functional dependencies) in the resulting set o...

Relation $$R$$ is decomposed using a set of functional dependencies, $$F,$$ and relation $$S$$ is decomposed using another set of functional dependencies, $$G.$$ One decomposition...

$$R(A,B,C,D)$$ is a relation. Which of the following does not have a lossless-join, dependency preserving $$BCNF$$ decomposition?

(a) Consider the relation scheme $$R(A, B, C)$$ with the following functional dependencies: $$\eqalign{ & A,B \to C \cr & \,\,\,\,\,\,C \to A \cr} $$ Show that the scheme $$R$$ is...

State True or False with reason. There is always a decomposition into Boyce-codd normal form $$(BCNF)$$ that is lossless and dependency preserving.