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Views in relational algebra:
1. Basic expression contains either
a) A relation in the database.
b) A constant relation.
2. General expressions are madde out of smaller sub expressions using
a) σp(E1) select (p a predicate)
b) ∏s(E1) project (s a list of attributes)
c) Px(E1)rename (x a relation name)
d) E1∪E2 union
e) E1- E2 set difference
f) E1x x E2 cartesian product
1. Use the Invoice table structure shown below to answer the following questions: a) Draw the dependency diagram and identify the primary key and all dependencies, including al
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What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
Which data manipulation command combines the records from one or more tables ? JOIN data manipulation command combines the records from one or more tables.
For the relations R and S given below: R S A B C 1 4 7 2 5 8 3 6 9
An employee record has the following structure struct employee { int eno; char name[22]; float salary; char dept[10];}; (i) Calculate the record size R in bytes.
Secondary Indexes Let consider the student database and its clustering index and primary (only one will be applicable at a time). Now consider the state when the database is to
I have one assignment that has to be done in neo4j
give some example real-life situations where DBMS are most suiitabe
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