Write the code you would place in the AverageButton click event on your form to call the Average query and the Highest query and display in a DifferenceLabel, the difference between the highest age of a student and the average age.
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
|
StudentID
|
Name
|
Age
|
Gender
|
ProgramID
|
|
791
|
Stephanie Brown
|
19
|
Female
|
BCS
|
|
236
|
Shannon Dawn
|
25
|
Female
|
BA
|
|
618
|
Geoff Berg
|
24
|
Male
|
ARET
|
|
256
|
Andrew Schilling
|
22
|
Male
|
BSC
|
|
902
|
Gary Sang
|
23
|
Male
|
DAAD
|
Note: There is a StudentDataSet with a Student table, a StudentTableAdapter, a StudentBindingSource, and a StudentDataGridView control on the form.
Note: There is an Average query, named Average, that returns the average age of the student from the Student table.
Note: There is also Max query, named Highest, that returns the highest age of the student from the Student table.
Write the code you would place in the AverageButton click event on your form to call the Average query and the Highest query and display in a DifferenceLabel, the difference between the highest age of a student and the average age.
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