BCNF Decomposition: Difference between revisions
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== | {{DISPLAYTITLE:BCNF Decomposition (BCNF Decomposition)}} | ||
== Description == | |||
BCNF Decomposition is the problem of decomposing a relation schema into Boyce-Codd normal form (BCNF). | |||
= | A relation schema $R$ is in Boyce Codd Normal Form (abbr. BCNF) if for all non-trivial FDs $X \rightarrow Y$ in $F^+$, $X$ is a superkey. In extending this notion to database schemas, we must be conscious of the UR-assumption. We say that $R_i = <ATTR_i,F_i>$ is in BCNF if the schema $<ATTR_i, F^+(ATTR_i)>$ is in BCNF, and $D$ is in BCNF if each $R_i$ is. | ||
== | == Related Problems == | ||
Related: [[Decisional BCNF]] | |||
== Parameters == | |||
$n$: size of database? | |||
$k$: number of functional dependencies | |||
== Table of Algorithms == | |||
Currently no algorithms in our database for the given problem. | |||
== Time Complexity Graph == | |||
[[File:BCNF Decomposition - Time.png|1000px]] | |||
Latest revision as of 10:09, 28 April 2023
Description
BCNF Decomposition is the problem of decomposing a relation schema into Boyce-Codd normal form (BCNF).
A relation schema $R$ is in Boyce Codd Normal Form (abbr. BCNF) if for all non-trivial FDs $X \rightarrow Y$ in $F^+$, $X$ is a superkey. In extending this notion to database schemas, we must be conscious of the UR-assumption. We say that $R_i = <ATTR_i,F_i>$ is in BCNF if the schema $<ATTR_i, F^+(ATTR_i)>$ is in BCNF, and $D$ is in BCNF if each $R_i$ is.
Related Problems
Related: Decisional BCNF
Parameters
$n$: size of database?
$k$: number of functional dependencies
Table of Algorithms
Currently no algorithms in our database for the given problem.
Time Complexity Graph
