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What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
diagrams and meaning
What are the drawbacks of shadow-paging technique? The drawbacks of shadow paging is:- a) Commit Overhead b) Data fragmentation c) Garbage collection
how to write a in a text and load it on mysql
Define check point and its impact on data base recovery. Ans: There could be hundreds of transactions handled per minute, in a large on-line database system.
I need to Map an E-R diagram to a relational schema
In which format database schema is written ? Data base schema is written in the DDL format.
Explain the Concept of Two-phase Locking It concerns the positions of locking and unlocking operations in each transaction. In this protocol every transaction issue lock and u
What are the physical characteristics of magnetic disks? Ans: A magnetic disk is a circular plate or platter of plastic or metal that is coated with magnetizable material lik
What is schema
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