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Anshuman Singh 2023-08-03 16:05:04 +05:30
parent 44ae053e6d
commit 01a856cbd4
1 changed files with 6 additions and 3 deletions
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09-schema-design.md
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@ -428,21 +428,24 @@ Let's approach this problem as one should in an interview.
- Use case 1: Log IN. - Use case 1: Log IN.
```sql ```sql
SELECT password FROM users WHERE email = xyz``` SELECT password FROM users WHERE email = xyz
```
Index on `email` in `users` Index on `email` in `users`
- Get all profiles for a given user - Get all profiles for a given user
```sql ```sql
SELECT id, name, profile_type_id FROM profiles WHERE user_id = xyz ``` SELECT id, name, profile_type_id FROM profiles WHERE user_id = xyz
```
Index on `user_id` in `profiles` Index on `user_id` in `profiles`
- Recently played videos - Recently played videos
```sql ```sql
SELECT video_id FROM video_profiles WHERE profile_id = xyz AND watch_status = 2 ORDER BY last_watched_ts DESC LIMIT 10``` SELECT video_id FROM video_profiles WHERE profile_id = xyz AND watch_status = 2 ORDER BY last_watched_ts DESC LIMIT 10
```
Index on (profile_id, watch_status) Index on (profile_id, watch_status)