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What is scale in bc?
The most basic element in bc is the number. The length is the total number of significant decimal digits in a number and the scale is the total number of decimal digits after the decimal point. For example, . 000001 has a length of 6 and scale of 6, while 1935.000 has a length of 7 and a scale of 3.
What is BC command?
The bc command is an interactive process that provides arbitrary-precision arithmetic. The bc command first reads any input files specified by the File parameter and then reads the standard input. The bc command allows you to specify an input and output base for operations in decimal, octal, or hexadecimal.
What does BC mean in bash?
BC, which stands for Basic Calculator, is a command in Bash that is used to provide the functionality of a scientific calculator within a Bash script. This can be useful for scripting with various arithmentic use cases and scenarios. This article shows you how to use BC in a Bash script.
How to solve Boyce Codd normal form ( BCNF )?
This can be solve by Boyce-Codd Normal Form (BCNF). Boyce–Codd Normal Form (BCNF) is based on functional dependencies that take into account all candidate keys in a relation; however, BCNF also has additional constraints compared with the general definition of 3NF.
Why is the relation BC > D in 2nd normal form?
The relation is in 2nd normal form because BC->D is in 2nd normal form (BC is not a proper subset of candidate key AC) and AC->BE is in 2nd normal form (AC is candidate key) and B->E is in 2nd normal form (B is not a proper subset of candidate key AC).
Are there any normal forms after BCNF or 4NF?
There are many more Normal forms that exist after BCNF, like 4NF and more. But in real world database systems it’s generally not required to go beyond BCNF. Exercise 1: Find the highest normal form in R (A, B, C, D, E) under following functional dependencies. Important Points for solving above type of question.
Is the relation in the 3rd normal form?
The relation is not in 3rd normal form because in BC->D (neither BC is a super key nor D is a prime attribute) and in B->E (neither B is a super key nor E is a prime attribute) but to satisfy 3rd normal for, either LHS of an FD should be super key or RHS should be prime attribute. So the highest normal form of relation will be 2nd Normal form.