Chapter 8, Problem 66P

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;

“Round()” function:

This function is used to round a number that specified in decimal places. The format of the “Round()” function is as follows:

Syntax:

ROUND(number, decimal_places)

AVG function:

• • It is one function of the aggregate function.
• • This function is used to get the average of all the values from the column.
• • Syntax: SELECT AVG(column_Name) FROM table_Name;

INNER JOIN keyword:

“INNER JOIN” keyword is used to select all the matching records of both the table.

Syntax:

SELECT col_Name FROM table_Name1 INNER JOIN table_Name2 ON table_Name1.col_Name = table_Name2.col_Name;

“GROUP BY” Clause:

The GROUP BY clause is used to group the result of a SELECT statement completed on a table where the values of tuple are identical 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;

ORDER BY Clause:

SQL contains “ORDER BY” clause in order to sort rows. The values get sorted in ascending as well as descending order. The keyword used to sort values in ascending order is “ASC” and for descending order is “DESC”. By default, it sorts values by ascending order.

Syntax:

SELECT column_Name1, column_Name2 FROM table_Name ORDER BY column_Name2;