“GROUP BY” Clause: The GROUP BY clause is used to group the result of a SELECT statement done on a table where the tuple values are similar for more than one column. Syntax: SELECT expression1, expression2, expression_n, aggregate_function (expression) FROM table_name WHERE conditions GROUP BY expression1, expression2, expression_n; DISTINCT Keyword: “DISTINCT” keyword is used to avoid redundant data (removing duplicate values) from a column. The syntax for “DISTINCT” keyword is as follows: Syntax: SELECT DISTINCT column_Name FROM table_Name; Join: Join is a relational operation, which combines the data from two or more tables into single table or view, then that is called as Join. Inner join: The “inner join” keyword is to select the matching records from two tables. The syntax of “inner join” is as follows: Syntax: SELECT column_name FROM table1 INNER JOIN table2 ON table1.column_name=table2.column_name;

Question

Create a static function in C# where poachers appear and attempt to hunt animals. It gets the location of the closest animal to itself. Take account of that the animal also move too, so it should update the closest location (x, y) everytime it moves to a new location. Use winforms to show the movements of poachers.

Answer 1

Question

Chapter 7, Problem 37P

Program Plan Intro

“GROUP BY” Clause:

The GROUP BY clause is used to group the result of a SELECT statement done on a table where the tuple values are similar for more than one column.

Syntax:

SELECT expression1, expression2, expression_n, aggregate_function (expression) FROM table_name WHERE conditions GROUP BY expression1, expression2, expression_n;

DISTINCT Keyword: “DISTINCT” keyword is used to avoid redundant data (removing duplicate values) from a column. The syntax for “DISTINCT” keyword is as follows:

Syntax:

SELECT DISTINCT column_Name FROM table_Name;

Join: Join is a relational operation, which combines the data from two or more tables into single table or view, then that is called as Join.

Inner join: The “inner join” keyword is to select the matching records from two tables. The syntax of “inner join” is as follows:

Syntax:

SELECT column_name FROM table1 INNER JOIN table2 ON table1.column_name=table2.column_name;

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