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Recent questions tagged tuple-relational-calculus
2
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0
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31
self doubt
in the question below in relational algebra if we use projection the relation is considered as a set and hence duplicates are not allowed will even trc and drc follow the same rule ?? rest all i understood only this point is doubtful https://gateoverflow.in/1546/gate2013_35 please clarify
Venkat Sai
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in
Databases
Oct 3, 2017
by
Venkat Sai
697
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databases
tuple-relational-calculus
domain
relational-calculus
3
votes
1
answer
32
SQL and Tuple Calculus
Q. Given the relational schema : ENROLL (S#, C#, Section), S# is student number. TEACH (Prof, C#, Section), C# is course number. ADVISE (Prof, S#), Prof is Thesis advisor of S# PRE-REQ (C#, pre-C#), pre-c# is prerequisite course. GRADE ( ... of the same course. (iv) List all students number and course number (v) List the student number and course number who got grade A
Tushar Pandey
asked
in
Databases
Aug 26, 2017
by
Tushar Pandey
2.3k
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relational-calculus
databases
tuple-relational-calculus
1
vote
0
answers
33
stackoverflow
I have to solve the queries using tuple relational calculus and I just want to know if I did them correctly. I'm using this database: EMPLOYEE: fname , minit , lname, ssn , bdate , address , sex , salary , superssn , dno DEPARTMENT: dname dnumber ... Salary > b.Salary))} Any help will be much appreciated. edit: Assume that only one employee can have the highest/lowest salary.
shashank023
asked
in
Databases
Jul 16, 2017
by
shashank023
528
views
tuple-relational-calculus
relational-calculus
0
votes
0
answers
34
ace practice booklet
joshi_nitish
asked
in
Databases
Jun 20, 2017
by
joshi_nitish
632
views
tuple-relational-calculus
1
vote
1
answer
35
Tuple relational calculus
An undirected simple graph is represented as G(a,b) and a tuple (x,y)€ G if x and y are adjacent vertices. which of the following can not be computed by a TRC query ? (A) Set of vertices who belongs to four length cycle (B) Set of vertices ... zero (C) Set of vertices which belongs to some cycle (D) Set of vertices which have degree n-1 where (n=total number of vertices)
Geet
asked
in
Databases
Jan 13, 2017
by
Geet
638
views
databases
tuple-relational-calculus
relational-calculus
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