59 lines
1.8 KiB
SQL
59 lines
1.8 KiB
SQL
DROP TABLE IF EXISTS tags;
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CREATE TABLE tags
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(
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tag_id INTEGER PRIMARY KEY AUTOINCREMENT,
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tag_name VARCHAR(25)
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);
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DROP TABLE IF EXISTS stream_tags;
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CREATE TABLE stream_tags
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(
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stream_id INTEGER NOT NULL,
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tag_id INTEGER NOT NULL,
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FOREIGN KEY (stream_id) REFERENCES streams(stream_id) ON DELETE CASCADE,
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FOREIGN KEY (tag_id) REFERENCES tags(tag_id) ON DELETE CASCADE
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);
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DROP TABLE IF EXISTS chat;
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CREATE TABLE chat
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(
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message_id INTEGER PRIMARY KEY AUTOINCREMENT,
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stream_id INTEGER NOT NULL,
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chatter_id VARCHAR(50) NOT NULL,
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message VARCHAR(256) NOT NULL,
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time_sent DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
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FOREIGN KEY (chatter_id) REFERENCES users(user_id),
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FOREIGN KEY (stream_id) REFERENCES streams(stream_id) ON DELETE CASCADE
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);
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CREATE INDEX chatter_index ON chat(chatter_id);
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DROP TABLE IF EXISTS categories;
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CREATE TABLE categories
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(
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category_id INTEGER PRIMARY KEY AUTOINCREMENT,
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category_name VARCHAR(25) NOT NULL
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);
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DROP TABLE IF EXISTS streams;
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CREATE TABLE streams
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(
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stream_id INTEGER PRIMARY KEY AUTOINCREMENT,
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user_id INTEGER NOT NULL,
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title TEXT NOT NULL,
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start_time DATETIME NOT NULL,
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num_viewers INTEGER NOT NULL DEFAULT 0,
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isLive BOOLEAN NOT NULL DEFAULT 0,
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vod_id INTEGER,
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category_id NOT NULL,
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FOREIGN KEY (category_id) REFERENCES categories(category_id) ON DELETE CASCADE,
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FOREIGN KEY (user_id) REFERENCES users(user_id) ON DELETE CASCADE
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);
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SELECT users.user_id, title, username, num_viewers, category_name
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FROM streams
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JOIN users ON users.user_id = streams.user_id
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JOIN categories ON streams.category_id = categories.category_id
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ORDER BY num_viewers DESC
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LIMIT 25; |