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Explaining what is Lossless Join & Spurious Tuple, How to Join tables after decomposing with real time example. Lossless join decomposition is topic under normalization in DBMS, Some more topics related to normalization are normal forms ...

b) What is lossless join decomposition (3M ) c) How a composite attribute can be converted into relational schema (6M ) UNIT-V 9. a) What is transaction? Discuss ACID Properties in detail? (6M) b) What is Phantom Problem? Can it occur in a database when the set of database objects is fixed and only the values of objects can be changed? (6M) (OR ...

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2) Give a lossless-join decomposition of R into BCNF. 3) Give a lossless-join decomposition of R into 3NF preserving f.d. Is you answer is in BCNF? 1) I and S must be in any candidate key since they do not appear on the right of any f.d. The question is whether they form a complete candidate key. And yes, IS → ISDBOQ.

UNIT-V Schema refinement – Problems Caused by redundancy – Decompositions – Problem related to decomposition – reasoning about FDS – FIRST, SECOND, THIRD Normal forms – BCNF – Lossless join Decomposition – Dependency preserving Decomposition – Schema refinement in Data base Design – Multi valued Dependencies – FORTH Normal ...