List of top Data Science and Artificial Intelligence Questions on SQL

Consider a fact table in an OLAP application: Facts(D1, D2, val), where D1 and D2 are its dimension attributes and val is a dependent attribute. Suppose attribute D1 takes 3 values and D2 takes 2 values, and all combinations of these values are present in the table Facts. How many tuples are there in the result of the following query? \[ \text{SELECT D1, D2, sum(val)} \] \[ \text{FROM Facts} \] \[ \text{GROUP BY CUBE (D1, D2);} \]

Given the table facts: \[ \text{facts (D1, D2, val)} \] with the following data: 

 Consider the following SQL query: 

 What is the total number of rows produced?

Consider the following two tables named Raider and Team in a relational database maintained by a Kabaddi league. The attribute ID in table Team references the primary key of the Raider table, ID.

Raider
ID	Name	Raids	RaidPoints
1	Arjun	200	250
2	Ankush	190	219
3	Sunil	150	200
4	Reza	150	190
5	Pratham	175	220
6	Gopal	193	215

Team
City	ID	BidPoints
Jaipur	2	200
Patna	3	195
Hyderabad	5	175
Jaipur	1	250
Patna	4	200
Jaipur	6	200

The SQL query described below is executed on this database :
SELECT *
FROM Raider, Team WHERE Raider.ID=Team.ID AND City="Jaipur" AND
RaidPoints > 200;
The number of rows returned by this query is ______.

An OTT company is maintaining a large disk-based relational database of different movies with the following schema :
Movie (ID, Customer Rating)
Genre (ID, Name)
Movie Genre (MovieID, GenreID)
Consider the following SQL query on the relation database above :
SELECT *
FROM Movie, Genre, Movie_Genre
WHERE
Movie. CustomerRating > 3.4 AND
Genre.Name = "Comedy" AND
Movie_Genre.MovieID = Movie. ID AND
Movie_Genre.Genre ID = Genre. ID;
This SQL query can be sped up using which of the following indexing options ?

Solve the following query: