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52 votes
5 answers
5
GATE CSE 2017 Set 1 | Question: 46
Consider a database that has the relation schema CR(StudentName, CourseName). An instance of the schema CR is as given below. ... $T2 \leftarrow CR\div T1$ The number of rows in $T2$ is ______________ .
Consider a database that has the relation schema CR(StudentName, CourseName). An instance of the schema CR is as given below.$$\begin{array}{|c|c|} \hline \textbf{Student...
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0 votes
0 answers
13
testbook
Can you help me understand the last 2 options
Can you help me understand the last 2 options
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1 votes
1 answer
15
ISI 2021 | PCB CS | Question: 9
In relational algebra, for any pair of relations $R_{1}$ and $R_{2}$, the standard division operation is denoted by $\div$ ...
In relational algebra, for any pair of relations $R_{1}$ and $R_{2}$, the standard division operation is denoted by $\div$ and defined as follows: $$ R_{1} \div R_{2}=\pi...
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32 votes
2 answers
17
GATE CSE 2019 | Question: 55
Consider the following relations $P(X,Y,Z), Q(X,Y,T)$ and $R(Y,V)$ ... Answer: ________
Consider the following relations $P(X,Y,Z), Q(X,Y,T)$ and $R(Y,V)$.$$\overset{\textbf{Table: P}}{\begin{array}{|l|l|l|} \hline \textbf{X} & \textbf{Y} & \textbf{Z} \\\hli...
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26 votes
5 answers
18
GATE CSE 1994 | Question: 3.8
Give a relational algebra expression using only the minimum number of operators from $(∪, −)$ which is equivalent to $R$ $∩$ $S.$
Give a relational algebra expression using only the minimum number of operators from $(∪, −)$ which is equivalent to $R$ $∩$ $S.$
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