SELECT statement: It is used to retrieve information from the table or database . The syntax for the “SELECT” statement is given below: Syntax: SELECT * FROM table_Name; 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; HAVING clause: “HAVING” clause is used to limit groups and it overcomes “WHERE” clause as it makes use of aggregate functions. Syntax: SELECT column_Name1, column_Name2 FROM table_name WHERE [conditions] GROUP BY column_name(s) HAVING [conditions] ORDER BY column_name;

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Abstract classes & Interfaces (Ch13) 5. See the code below and solve the following. class Circle { protected double radius; // Default constructor public Circle() ( } this(1.0); // Construct circle with specified radius public Circle(double radius) { } this.radius radius; // Getter method for radius public double getRadius() { } return radius; // Setter method for radius public void setRadius(double radius) { } this.radius = radius; // Implement the findArea method defined in GeometricObject public double findArea() { } return radius* radius * Math. PI; // Implement the find Perimeter method defined in GeometricObject public double findPerimeter() { } return 2*radius*Math.PI; // Override the equals() method defined in the Object class public boolean equals(Circlel circle) { } return this.radius == circle.getRadius(); // Override the toString() method defined in the Object class public String toString() { } } return "[Circle] radius = " + radius; 5-1. Define a class name…

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Chapter 1, Problem 4SCG

Program Plan Intro

SELECT statement:

It is used to retrieve information from the table or database. The syntax for the “SELECT” statement is given below:

Syntax:

SELECT * FROM table_Name;

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;

HAVING clause:

“HAVING” clause is used to limit groups and it overcomes “WHERE” clause as it makes use of aggregate functions.

Syntax:

SELECT column_Name1, column_Name2 FROM table_name WHERE [conditions] GROUP BY column_name(s) HAVING [conditions] ORDER BY column_name;

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