Login
Register
Dark Mode
Brightness
Profile
Edit Profile
Messages
My favorites
My Updates
Logout
Recent questions tagged relational-algebra
4
votes
1
answer
1
GO Classes Test Series 2024 | Mock GATE | Test 14 | Question: 13
Division operator in relational algebra is appropriate to handle which of the following query types? employees work on at most one of the critical projects employees work on any one of the critical projects employees work on at least one of the critical projects employees work on all the critical projects
Division operator in relational algebra is appropriate to handle which of the following query types?employees work on at most one of the critical projectsemployees work o...
GO Classes
386
views
GO Classes
asked
Feb 5
Databases
goclasses2024-mockgate-14
databases
relational-algebra
1-mark
+
–
0
votes
0
answers
2
Memory Based GATE DA 2024 | Question: 47
You are given three tables: `team`, `table1`, and `table2`. To find the names of all players in the team who are either present in `table1` or `table2`, consider the following relational algebra queries: \(\Pi_{\text{{PlayerName}}}(\text{{team}}) \,/\, \ ... text{{Name}}}(\text{{table1}} \cap \text{{table2}}) \,/\, \Pi_{\text{{PlayerName}}}(\text{{team}})\)
You are given three tables: team , table1 , and table2 . To find the names of all players in the team who are either present in table1 or table2 , consider the foll...
GO Classes
130
views
GO Classes
asked
Feb 4
Databases
gate2024-da-memory-based
goclasses
databases
relational-algebra
+
–
3
votes
1
answer
3
GO Classes Test Series 2024 | Mock GATE | Test 13 | Question: 31
Let $\text{R}_1, \text{R}_2, \ldots,\text{ }R_n$ be a decomposition of schema $\text{U}$. Let $u(\text{U})$ be a relation, and let $r_i=\Pi_{\text{R}_i}(u)$ ... $u=r_1 \bowtie r_2 \bowtie r_3 \bowtie r_4 \bowtie . . r_n$ None of the above
Let $\text{R}_1, \text{R}_2, \ldots,\text{ }R_n$ be a decomposition of schema $\text{U}$. Let $u(\text{U})$ be a relation, and let $r_i=\Pi_{\text{R}_i}(u)$Which of the f...
GO Classes
399
views
GO Classes
asked
Jan 28
Databases
goclasses2024-mockgate-13
goclasses
databases
relational-algebra
1-mark
+
–
3
votes
2
answers
4
GO Classes Test Series 2024 | Mock GATE | Test 13 | Question: 65
Let $r(X, Y)$ and $s(Y)$ be two relations. What is returned by the following relational algebra query? Values of $r.X$ which are related to every value of $s.Y$. Values of $r.Y$ which are related to every value of $s.Y$. ... which are not related to some value of $s.Y$. Values of $r.X$ which are not related to any value of $s.Y$.
Let $r(X, Y)$ and $s(Y)$ be two relations.What is returned by the following relational algebra query?Values of $r.X$ which are related to every value of $s.Y$.Values of $...
GO Classes
498
views
GO Classes
asked
Jan 28
Databases
goclasses2024-mockgate-13
goclasses
databases
relational-algebra
2-marks
+
–
0
votes
0
answers
5
testbook
Can you help me understand the last 2 options
Can you help me understand the last 2 options
Rohit Chakraborty
134
views
Rohit Chakraborty
asked
Jan 3
Databases
testbook-test-series
rdbms
relational-algebra
+
–
0
votes
0
answers
6
Hamburg University Exercise 4.1 Sizes of Relations
Given two relations R1 and R2 where R1 contains N1 tuples and R2 contains N2 tuples, give the minimum and maximum possible sizes (in tuples) for the relation produced by each of the following relational algebra expressions. Try to be as accurate as possible (i.e., formulate ... - (πB(R1) - πB(R2))| ≤ N1 (10): 0 ≤ |σA>B(R1) ∪ σA<B(R1)| ≤ N1
Given two relations R1 and R2 where R1 contains N1 tuples and R2 contains N2 tuples, give the minimum and maximum possible sizes (in tuples) for the relation produced by ...
beginner
214
views
beginner
asked
Nov 1, 2023
Databases
databases
relational-algebra
+
–
0
votes
1
answer
7
Database
Considering the following schema, create the appropriate tables and insert at least 5 records: AUTHOR(author-id,name, city,country) PUBLISHER (publisher-id, name,city, country) CATALOG (book-id, title, author-id, publisher-id, category-id, year, price) CATEGORY ( ... in the catalog. (g) Obtain the author and publisher who have published books in more than or 14 equal to 2 categories.
Considering the following schema, create the appropriate tables and insert at least 5 records:AUTHOR(author-id,name, city,country)PUBLISHER (publisher-id, name,city, coun...
gateexplore
955
views
gateexplore
asked
Jun 30, 2023
Databases
sql
relational-algebra
databases
self-doubt
+
–
Page:
1
2
3
4
5
6
...
11
next »
Email or Username
Show
Hide
Password
I forgot my password
Remember
Log in
Register