princesah09 / 3-twitter-queries

This repository contains SQL queries for interacting with a Twitter-like database schema. The queries perform various operations such as fetching user information, tweet statistics, and user timelines.

Assignment-3-Twitter-Queries

Note: All data are stored inside the repo file (Twitter_Querry.sql)

Answers of Assignment

1. Fetch all users name from database.

 select
    user_name
from
    users;

2. Fetch all tweets of user by user id most recent tweets first.

select
    Tweet.content,
    users.user_name,
    Tweet.twitted_at
from
    Tweet
    Join users on Tweet.user_id = users.id
where
    Tweet.user_id = 3
order by
    Tweet.twitted_at DESC; 

3. Fetch like count of particular tweet by tweet id.

select
    count(*) as LikeCount
from
    Likes
where
    tweet_id = 2;

4. Fetch retweet count of particular tweet by tweet id.

select
    count(*) as RetweetCount
from
    Retweet
where
    parent_tweet_id = 2;

5. Fetch comment count of particular tweet by tweet id.

SELECT
    COUNT(*) AS CommentCount
FROM
    Tweet
WHERE
    parent_tweet_id = 1;

6. Fetch all users' names who have retweeted a particular tweet by tweet id.

select
    users.user_name
from
    Retweet
    JOIN users on Retweet.user_id = users.id
where
    Retweet.parent_tweet_id = 2;

7. Fetch all commented tweet’s content for particular tweet by tweet id.

SELECT
    CommentedTweet.content
FROM
    Tweet AS CommentedTweet
    JOIN Tweet AS Comment ON CommentedTweet.tweet_id = Comment.parent_tweet_id
WHERE
    Comment.parent_tweet_id = 2

8. Fetch user’s timeline (All tweets from users whom I am following with tweet content and user name who has tweeted it)

SELECT
    Tweet.content,
    users.user_name AS UserName
FROM
    Tweet
    JOIN users ON Tweet.user_id = users.id
WHERE
    Tweet.user_id IN (
        SELECT
            followed_id
        FROM
            Follow
        WHERE
            follower_id = 1
    )
ORDER BY
    Tweet.twitted_at DESC;