True question of MySQL interview (29) -- case - finding favorite movies

Find your favorite movies

A movie platform （ It's like Douban 、 The cat's eye film ） use 3 A table to record movie information .
“ Movie list ” In is the movie number 、 The movie name 、 Movie description information .

“ Category table ” It's movie classification information , Categories include ： Crime movies 、 love film 、 Science fiction film .

“ Movie category table ” It's the corresponding movie （ The movie number in the movie table ） What kind of （ Movie category number in the category table ）

lookup “ Movie list ” The movie description information contains “ robot ” In the movie , Find out the corresponding movie category name and the number of movies , It is also required that the film category name corresponds to the number of films >=5 Ministry .

SELECT 
   Movie category name ,
  COUNT(*) AS  Number of films  
FROM
   Movie list  
  LEFT JOIN  Movie category table  USING ( Movie number ) 
  LEFT JOIN  Category table  USING ( Movie category number ) 
WHERE  Movie description information  LIKE '% robot %' 
GROUP BY  Movie category name  
HAVING  Movie category name  IN 
  (SELECT 
     Movie category name  
  FROM
     Movie category table  
    JOIN  Category table  USING ( Movie category number ) 
  GROUP BY  Movie category name  
  HAVING COUNT(*) >= 5)

give the result as follows ：