1 / 6

CIS 218

CIS 218. Defining Fields. Field Definition. Assign fields to tables Create field names Unique Descriptive Clear and unambiguous Avoid acronyms Use singular form. Field Definition. Specify column properties Data type Required or optional “NOT NULL” or “NULL” Default value

dard
Télécharger la présentation

CIS 218

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CIS 218 Defining Fields

  2. Field Definition • Assign fields to tables • Create field names • Unique • Descriptive • Clear and unambiguous • Avoid acronyms • Use singular form

  3. Field Definition • Specify column properties • Data type • Required or optional • “NOT NULL” or “NULL” • Default value • Rules (data constraints/restrictions)

  4. Representing an Entity as a Table ITEM ItemNumber Description Cost ListPrice QuantityOnHand

  5. Data Types in Access

  6. Column Properties in Access

More Related