What are VDL and SDL?

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Hi!!

Can someone tell me what exactly do the terms VDL & SDL mean?
Nov 13, 2018 in Database by darklord
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VDL(View Definition Language): Represents user views and their mapping to the conceptual schema.

SDL(Storage Definition Language): Specifies the mapping between two schemas.

answered Nov 13, 2018 by DataKing99
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Pls explain with examples. These definitions do not help us!

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