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SQL exercises on movie Database: Compute a report which contain the genres of those movies with their average time and number of movies for each genres

SQL movie Database: Join Exercise-10 with Solution

10. From the following table, write a SQL query to compute the average time and count number of movies for each genre. Return genre title, average time and number of movies for each genre.

Sample table: movie


Sample table: genres


Sample table: movie_genres


Sample Solution: 

SELECT gen_title, AVG(mov_time), COUNT(gen_title) 
FROM movie
NATURAL JOIN  movie_genres
NATURAL JOIN  genres
GROUP BY gen_title;

Sample Output:

      gen_title       |         avg          | count
----------------------+----------------------+-------
 Adventure            | 162.5000000000000000 |     2
 Comedy               |  93.0000000000000000 |     1
 Drama                | 134.2500000000000000 |     4
 Horror               | 100.0000000000000000 |     1
 Thriller             | 117.0000000000000000 |     1
 Crime                | 124.0000000000000000 |     2
 Action               | 137.0000000000000000 |     1
 Music                | 118.0000000000000000 |     1
 War                  | 183.0000000000000000 |     1
 Romance              | 122.0000000000000000 |     1
 Animation            | 134.0000000000000000 |     1
 Mystery              | 137.3333333333333333 |     3
(12 rows)

Relational Algebra Expression:

Relational Algebra Expression: Compute a report which contain the genres of those movies with their average time and number of movies for each genres.

Relational Algebra Tree:

Relational Algebra Tree: Compute a report which contain the genres of those movies with their average time and number of movies for each genres.

Practice Online


Movie database model

Query Visualization:

Duration:

Query visualization of Compute a report which contain the genres of those movies with their average time and number of movies for each genres - Duration

Rows:

Query visualization of Compute a report which contain the genres of those movies with their average time and number of movies for each genres - Rows

Cost:

Query visualization of Compute a report which contain the genres of those movies with their average time and number of movies for each genres - Cost

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Previous: From the following tables, write a SQL query to find the movies released before 1st January 1989. Sort the result-set in descending order by date of release. Return movie title, release year, date of release, duration, and first and last name of the director.
Next: From the following tables, write a SQL query to find movies with the lowest duration. Return movie title, movie year, director first name, last name, actor first name, last name and role.

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SQL: Tips of the Day

SQL Server SELECT into existing table. 

INSERT INTO dbo.TABLETWO
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

This assumes there's only two columns in dbo.TABLETWO - you need to specify the columns otherwise:

INSERT INTO dbo.TABLETWO
  (col1, col2)
SELECT col1, col2
  FROM dbo.TABLEONE
 WHERE col3 LIKE @search_key

Database: SQL Server

Ref: https://bit.ly/3y6tpA3