Chapter 4, Problem 15TD

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.

“SUM” function:

• It is the one function of aggregate function.
• The “SUM” function is used to compute the total of the values in a column.

Example:

The example for “SUM” function is given below:

SELECT SUM(MARK_CREDIT) FROM STUDENT;

The above query is used to display the sum of all students mark credit from “STUDENT” table using “SUM” function.