(In C prog.) What is the difference between scanf, getche and getchar?

1 answer:

7 0

<span>getchar() only reads a single character input from any input stream.
getche() </span><span>reads a single character from the keyboard and displays immediately on output screen without waiting for enter key
scanf() reads the whole input line according to the data type you specified.</span>

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SELECT statement are used to retrieve data from a database table

The SELECT statement that creates the lesson schedule is:

<em>SELECT LessonDateTime, HorseID, FirstName, LastName FROM LessonSchedule JOIN Student ON LessonSchedule.StudentID = Student.ID ORDER BY LessonDateTime ASC, HorseID</em>

<h3>How to determine the SELECT statement</h3>

To write the select statement, we start by writing the following query that retrieves Lesson date/time, horse ID, first name, and last name from the lesson schedule table.

So, we have:

SELECT LessonDateTime, HorseID, FirstName, LastName FROM LessonSchedule

Next, the query would confirm the presence of a student ID in the lesson schedule table and the student table using the JOIN statement

JOIN Student ON LessonSchedule.StudentID = Student.ID

From the question, we understand that:

The result should be sorted in ascending order by lesson date/time.

This is represented as:

ORDER BY LessonDateTime ASC, HorseID

Hence, the complete query is:

SELECT LessonDateTime, HorseID, FirstName, LastName FROM LessonSchedule JOIN Student ON LessonSchedule.StudentID = Student.ID ORDER BY LessonDateTime ASC, HorseID