May 2024
Intermediate to advanced
325 pages
12h 2m
English
Content preview from Distributed Database Systems, 1st Edition by Chhanda Ray
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Overview of Relational DBMS
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Student
sreg-no sname cname
S01 Amit B.Tech
S02 John B.Tech
S03 Rohit B.Pharm
S04 Ankit M.Tech
S05 Sachin MBA
S06 Anuj M.Tech
S07 Sagar MBA
Fig. 1.7 Result of Projection Operation
1.4.3 Union Operation
The union operation is a binary operation, and it is denoted by the symbol ∪. The union operation of
two relations R and S selects all tuples that are in R, or in S, or in both, eliminating duplicate tuples.
Hence, R and S must be union-compatible. Two relations are said to be union-compatible, if they have
the same number of attributes and each pair of corresponding attributes have the same domain.
1.4.4 Set Difference ...
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