Tables. What is a Table? A part of a database Container for data Pieces of data, put together, have...
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Transcript of Tables. What is a Table? A part of a database Container for data Pieces of data, put together, have...
What is a Table?
• A part of a database• Container for data• Pieces of data, put together, have a meaning
Parts of a Table
• Field – Smallest part of a database– Specific piece of data
• Record– Related fields
• Table– Related records
Setting up a Table
1. Identify the fields that are needed2. Identify any property settings3. Name table with preface of tbl
Identify the Fields
• From discovery process• Organize into tables• Watch for redundancy– Relational database
Text
• Default data type• Default size is 255 characters• Properties– Field size – from 1 to 255– Format• < forces lowercase• > forces upper case• Different for other data types
More Text
• Default Value – most people from ND, save them from having to type the information
• Validation Rule– If the organization was established in 1995, the
enter >1994 – no one will be able to put in <=1994• Validation Text – message that pops up when
there is an invalid entry• Required