DATABASE CONCEPTS+MYITLAB
DATABASE CONCEPTS+MYITLAB
18th Edition
ISBN: 9780134821245
Author: KROENKE
Publisher: PEARSON C
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Chapter 2, Problem 2.15RQ

Explanation of Solution

Surrogate primary key:

  • A system assigned primary key in a relational database such as a serial number or any other which is not derived from any data in the database is known as surrogate primary key.
  • It is deputy of the primary key and will act as a primary key in the database and does not have any other significance.
  • To simplify the primary key structures in the database, surrogate primary keys are created, and this ensures unique identification process in a relation.

Conditions to use the surrogate key:

The surrogate key for a relation is created when a primary key of a relation holds the below three conditions:

  • If the relation has a composite primary key, then surrogate key should be created...

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I need help to solve a simple problem using Grover’s algorithm, where the solution is not necessarily known beforehand. The problem is a 2×2 binary sudoku with two rules: • No column may contain the same value twice. • No row may contain the same value twice.   Each square in the sudoku is assigned to a variable as follows:   We want to design a quantum circuit that outputs a valid solution to this sudoku. While using Grover’s algorithm for this task is not necessarily practical, the goal is to demonstrate how classical decision problems can be converted into oracles for Grover’s algorithm.   Turning the Problem into a Circuit   To solve this, an oracle needs to be created that helps identify valid solutions. The first step is to construct a classical function within a quantum circuit that checks whether a given state satisfies the sudoku rules.   Since we need to check both columns and rows, there are four conditions to verify: v0 ≠ v1   # Check top row   v2 ≠ v3   # Check bottom row…
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