Database Fundamentals/Functions

This lesson introduces functions.

Objectives and SkillsEdit

Objectives and skills for the functions portion of Microsoft Exam 98-364 Database Fundamentals include:[1]

  • Create database objects
    • Create stored procedures and functions
      • Select, insert, update, or delete data

ReadingsEdit

  1. Wikipedia: Function (computer science)

MultimediaEdit

  1. Microsoft Virtual Academy: Creating Databases and Database Objects
  2. YouTube: SQL Functions

ActivitiesEdit

  1. Use SQL Server to create built-in functions to calculate data in the Student table in your College database.
  2. Create the following built-in functions:
    • Apply the AVG function in a query to display the average number of course credit hours in the Course table.
    • Apply the MAX function in a query to display the maximum number of course credit hours in the Course table.
    • Apply the SUM function in a query to display the total number of course credit hours in the Course table.

Lesson SummaryEdit

  • A user-defined function (UDF) is a function provided by the user of a program or environment, in a context where the usual assumption is that functions are built into the program or environment. [2]
  • An aggregate function is a function where the values of multiple rows are grouped together as input on certain criteria to form a single value of more significant meaning or measurement such as a set, a bag or a list.). [3]

Key TermsEdit

function

See AlsoEdit

ReferencesEdit

  Type classification: this is a lesson resource.