Reqs :

1. Create a DB named DoctorWho.

2. Write scripts to create the above tables, keys, relationships and constraints.

3. Write scripts to insert at least 5 records in each table.

4. Write a script to update the the episode name to {ORIGINAL_EPISODE_NAME}_CANCELLED for only the episodes with zero doctor appearances.

5. Write a query to delete all companions who didn't appear on an episode.

6. Create a function called fnCompanions to printout the companions names for a given episode

   • Input: EpisodeId
   • Output: Companion 1 Name, Companion 2 Name, Companion 3 Name, etc.

7. Create a function called fnEnemies to printout the enemies names for a given episode

   • Input: EpisodeId
   • Output: Enemy 1 Name, Enemy 2 Name, Enemy 3 Name, etc.

8. Create a SQL view called viewEpisodes to list out all episodes, include:

   • Author Name

   • Doctor Name

   • Companions

   • Enemies

     P.S. Make use of the previous created functions

9. Create a stored procedure called spSummariseEpisodes to show:

   • The 3 most frequently-appearing companions; then separately
   • The 3 most frequently-appearing enemies.