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Recent questions tagged relational-algebra
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31
Database: Relational Algebra
Let R be a relation of degree 5 then the total number of projections possible on R is ___?
Let R be a relation of degree 5 then the total number of projections possible on R is ___?
Ashutosh_17
788
views
Ashutosh_17
asked
Mar 30, 2023
Databases
relational-algebra
databases
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–
1
votes
1
answer
32
GO Classes 2023 | IIITH Mock Test 1 | Question: 47
Consider the following relations and query. $ \begin{gathered} \textsf{r(A, B, C)}\\ \textsf{s(A, B, C)}\\ \sigma_{\textsf{A>C}}([(\textsf{r} \cup \text{s) - (r - s)] - (s - r))} \end{gathered} $ Which of the following is ... $\sigma_{\textsf{A>C}}(\text{r} \cap \textsf{s})$
Consider the following relations and query.$$\begin{gathered}\textsf{r(A, B, C)}\\\textsf{s(A, B, C)}\\\sigma_{\textsf{A>C}}([(\textsf{r} \cup \text{s) - (r - s)] - (s - ...
GO Classes
362
views
GO Classes
asked
Mar 26, 2023
Databases
goclasses2023-iiith-mock-1
goclasses
databases
relational-algebra
multiple-selects
1-mark
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0
votes
1
answer
33
GATE CSE 2023 | Memory Based Question: 34
Which one of the options given below refers to the degree (or arity) of a relation in relational database systems? Number of tuples stored in relation. Number of distinct domains of its relation schema. Number of attributes in relation. Number of entries in relation.
Which one of the options given below refers to the degree (or arity) of a relation in relational database systems?Number of tuples stored in relation.Number of distinct d...
GO Classes
1.7k
views
GO Classes
asked
Feb 5, 2023
Databases
memorybased-gatecse2023
goclasses
databases
relational-algebra
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0
votes
1
answer
34
#gradeup
Dknights
330
views
Dknights
asked
Dec 7, 2022
Databases
databases
relational-algebra
tuple-relational-calculus
gradeup-test-series
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0
votes
0
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35
a) Following relational schema is given: Doctor (DName, Reg_no,D_City), Patient (Pname, Disease, P_City) and Assigned To (Pname, Dname) Give expression in Relational Algebra for each of the queries: i) Get the names of patients who are assigned to more than one doctor. ii) Get the names of doctors who are treating patients with 'Polio’. iii) Get the details of doctors who are treating to the patient belongs to the same city. iv) Count the number of patients treated by each doctor
ayushrathore111
810
views
ayushrathore111
asked
Nov 28, 2022
Databases
databases
relational-algebra
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2
votes
1
answer
36
GO Classes Test Series 2023 | Databases | Test 3 | Question: 2
Consider the following database schema with a relation $\textsf{"Likes" :}$ $\textsf{Likes(kid, candy)}$ ... ; candy. The query is to find the kids who like neither "Hersheys" nor "Mars" candy.
Consider the following database schema with a relation $\textsf{"Likes" :}$$$\textsf{Likes(kid, candy)}$$Table Likes tells which candy a kid likes.Consider the following ...
GO Classes
135
views
GO Classes
asked
Oct 7, 2022
Databases
goclasses2024-dbms-3-weekly-quiz
goclasses
databases
relational-algebra
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