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what is DB schema?

Posted on 2006-11-26
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pls with full description?
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Question by:suoju
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by:sivachirravuri
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Arthur_Wood earned 116 total points
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by:AlexNek
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DB  schema is description of a database included table /column description.
Can be in different format
here is the text format
http://web.mit.edu/is/delivery/iswork/dbschema.html
or in visual representation
http://dbschemaviewer.sourceforge.net/screenshots/DBSchemaViewer-screen1.png
search database design too
http://en.wikipedia.org/wiki/Database_design
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by:suoju
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but what is the official explain about schema from the DB design?

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by:Arthur_Wood
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I do not kno what you mean by "what is the official explain about schema from the DB design"

did you look at the two Wikipedia articles that I pointed you to?

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by:profya
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Simple answer you can understand, the schema is the details of database objects, the columns of a table along with their data types, indices, constraints, checks, rules, identity etc. In views the SQL of the view and column names, view indices etc. The difference is that the proper schema guides to proper database design, also documented schema allows you to re-design the database again in case it has been lost for any reason. Sometimes we talk about a database that is not yet implemented; we then use its schema to identify. I hope this simple and clear.
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