﻿ SQL exercises on movie Database: Find those movies which have received highest number of stars - w3resource

# SQL exercises on movie Database: Find the movie title, and the highest number of stars that movie received

## SQL movie Database: Subquery Exercise-11 with Solution

11. From the following tables, write a SQL query to find those movies, which have received highest number of stars. Group the result set on movie title and sorts the result-set in ascending order by movie title. Return movie title and maximum number of review stars.

Sample table: rating

Sample table: movie

Sample Solution:

``````SELECT mov_title, MAX(rev_stars)
FROM movie, rating
WHERE movie.mov_id=rating.mov_id
AND rating.rev_stars IS NOT NULL
GROUP BY  mov_title
ORDER BY mov_title;
``````

Sample Output:

```                     mov_title                      | max
----------------------------------------------------+------
Aliens                                             | 8.40
American Beauty                                    | 7.00
Annie Hall                                         | 8.10
Avatar                                             | 7.30
Beyond the Sea                                     | 6.70
Blade Runner                                       | 8.20
Boogie Nights                                      | 3.00
Braveheart                                         | 7.70
Donnie Darko                                       | 8.10
Good Will Hunting                                  | 4.00
Lawrence of Arabia                                 | 8.30
Princess Mononoke                                  | 8.40
Slumdog Millionaire                                | 8.00
The Innocents                                      | 7.90
The Usual Suspects                                 | 8.60
Titanic                                            | 7.70
Vertigo                                            | 8.40
(17 rows)
```

Code Explanation:

The said query in SQL that retrieves the movie titles along with the maximum rating stars for each movie, where the ratings are not null. The results are sorted in alphabetical order based on the movie titles.
The query joins the movie and rating tables using the mov_id column, then applies a filter to exclude any rows where the rev_stars column is null. The MAX function is used to retrieve the highest rating value for each movie title, and the GROUP BY clause is used to group the results by mov_title. The ORDER BY clause sorts the results in alphabetical order based on mov_title.

Relational Algebra Expression:

Relational Algebra Tree:

## Query Visualization:

Duration:

Rows:

Cost:

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## SQL: Tips of the Day

What is the best way to paginate results in SQL Server?

```SELECT  *
FROM    ( SELECT    ROW_NUMBER() OVER ( ORDER BY OrderDate ) AS RowNum, *
FROM      Orders
WHERE     OrderDate >= '1980-01-01'
) AS RowConstrainedResult
WHERE   RowNum >= 1
AND RowNum < 20
ORDER BY RowNum
```

Database: SQL Server

Ref: https://bit.ly/3MGrNlk

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