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Differentiate between a subquery and a join
If we need to acquire information from one or more tables after that either subquery or join can be used. If the columns which are to appear in the result table are from different tables after that a join must be employed.
What is multiplicity in the associations? Give an example to explain multiplicity? Multiplicity in association indicate number of objects participate in any relationship. For
why are older data base model are being replaced by new data model
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What are the drawbacks of shadow-paging technique? The drawbacks of shadow paging is:- a) Commit Overhead b) Data fragmentation c) Garbage collection
please give me introduction to full data in D B M S in a short assignment
What is bucket overflow and how bucket overflow is handled through Over Flow Chaining or Closed Hashing? Ans: Bucket: unit of storage holding records. Bucket is a disk block
1. Create the tables for the play-scheme database as specified in the TMA. 2. Enter the data as given in the spreadsheet. 3. Create queries to retrieve specified information
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What is the way a particular application views the data from the database that the application uses? Sub schema is the way a particular application views the data from the data
Explain the ISA relationship Answer: ISA relationship - ISA notation is employed in generalization/ specialization to depict relationship among lower and higer level entity s
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