“SELECT” command: The “SELECT” command is used to retrieve data in a database . Syntax for selecting values from the table is as follows: SELECT STUDENT_ID FROM STUDENT; The given query is used to display each student ID from “STUDENT” table. “IN” Clause: The “IN” clause consists of an “IN” operator followed by a set of values. Using an “IN” clause, user can determine whether a column contains one of a particular group of values. Example: The example for “IN” clause is given below: SELECT STUDENT_ID, STUDENT_NAME, STUDENT_CREDIT FROM STUDENT WHERE STUDENT_CREDIT IN(50, 70, 100); The above query is used to list student ID, name, and credit for each student with a credit limit of “50”, “70” or “100”. From the given query, user can determine whether a student credit limit is “50”, “70” or “100” using an “IN” operator.

Question

Change the following code so that there is always at least one way to get from the left corner to the top right, but the labyrinth is still randomized. The player starts at the bottom left corner of the labyrinth. He has to get to the top right corner of the labyrinth as fast he can, avoiding a meeting with the evil dragon. Take care that the player and the dragon cannot start off on walls. Also the dragon starts off from a randomly chosen position public class Labyrinth { private final int size; private final Cell[][] grid; public Labyrinth(int size) { this.size = size; this.grid = new Cell[size][size]; generateLabyrinth(); } private void generateLabyrinth() { Random rand = new Random(); for (int i = 0; i < size; i++) { for (int j = 0; j < size; j++) { // Randomly create walls and paths grid[i][j] = new Cell(rand.nextBoolean()); } } // Ensure start and end are…

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Question

Chapter 4, Problem 15SCG

Program Plan Intro

“SELECT” command:

The “SELECT” command is used to retrieve data in a database.

Syntax for selecting values from the table is as follows:

SELECT STUDENT_ID FROM STUDENT;

The given query is used to display each student ID from “STUDENT” table.

“IN” Clause:

The “IN” clause consists of an “IN” operator followed by a set of values.

Using an “IN” clause, user can determine whether a column contains one of a particular group of values.

Example:

The example for “IN” clause is given below:

SELECT STUDENT_ID, STUDENT_NAME, STUDENT_CREDIT FROM STUDENT WHERE STUDENT_CREDIT IN(50, 70, 100);

The above query is used to list student ID, name, and credit for each student with a credit limit of “50”, “70” or “100”.

From the given query, user can determine whether a student credit limit is “50”, “70” or “100” using an “IN” operator.

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