Sam Landsman

queries.sql

@@ -0,0 +1,100 @@
+PRAGMA foreign_keys = ON;
+
+DROP TABLE IF EXISTS organization;
+DROP TABLE IF EXISTS channel;
+DROP TABLE IF EXISTS user;
+DROP TABLE IF EXISTS user_channels;
+DROP TABLE IF EXISTS message_table;
+
+CREATE TABLE organization (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name VARCHAR(128)
+);
+
+CREATE TABLE channel (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name VARCHAR(128),
+    organization_id INTEGER,
+    FOREIGN KEY(organization_id) REFERENCES organization(id)
+);
+
+CREATE TABLE user (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name VARCHAR(128)
+);
+
+CREATE TABLE user_channels (
+    userid INTEGER,
+    channel_id INTEGER,
+    FOREIGN KEY(userid) REFERENCES user(id),
+    FOREIGN KEY(channel_id) REFERENCES channel(id)
+);
+
+CREATE TABLE message_table (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    content TEXT,
+    post_time DATETIME,
+    channel_id INTEGER,
+    author_id INTEGER,
+    FOREIGN KEY(channel_id) REFERENCES channel(id),
+    FOREIGN KEY(author_id) REFERENCES user(id)
+);
+
+INSERT INTO organization (name) VALUES ("Lambda School");
+
+INSERT INTO user (name) VALUES ("Alice");
+INSERT INTO user (name) VALUES ("Bob");
+INSERT INTO user (name) VALUES ("Chris");
+
+INSERT INTO channel (name, organization_id) VALUES ("#general", 1);
+INSERT INTO channel (name, organization_id) VALUES ("#random", 1);
+
+INSERT INTO user_channels (userid, channel_id) VALUES (1, 1);
+INSERT INTO user_channels (userid, channel_id) VALUES (1, 2);
+INSERT INTO user_channels (userid, channel_id) VALUES (2, 1);
+INSERT INTO user_channels (userid, channel_id) VALUES (3, 2);
+
+INSERT INTO message_table (content, channel_id, author_id) VALUES ("message", 1, 1);
+INSERT INTO message_table (content, channel_id, author_id) VALUES ("message", 1, 2);
+INSERT INTO message_table (content, channel_id, author_id) VALUES ("message", 1, 3);
+INSERT INTO message_table (content, channel_id, author_id) VALUES ("message", 2, 1);
+INSERT INTO message_table (content, channel_id, author_id) VALUES ("message", 2, 1);
+INSERT INTO message_table (content, channel_id, author_id) VALUES ("message", 2, 1);
+INSERT INTO message_table (content, channel_id, author_id) VALUES ("message", 2, 1);
+INSERT INTO message_table (content, channel_id, author_id) VALUES ("message", 2, 3);
+INSERT INTO message_table (content, channel_id, author_id) VALUES ("message", 2, 3);
+INSERT INTO message_table (content, channel_id, author_id) VALUES ("message", 2, 3);
+
+SELECT * FROM organization;
+SELECT * FROM channel;
+
+SELECT channel.name FROM channel, organization
+    WHERE channel.organization_id = organization.id AND organization.name = "Lambda School";
+
+SELECT message_table.content FROM message_table, channel
+    WHERE message_table.channel_id = channel.id AND channel.name = "#general"
+    ORDER BY post_time;
+
+SELECT channel.name FROM channel, user_channels, user
+    WHERE user_channels.userid = user.id AND
+    user_channels.channel_id = channel.id AND
+    user.name = "Alice";
+
+SELECT user.name FROM channel, user_channels, user
+    WHERE user_channels.userid = user.id AND
+    user_channels.channel_id = channel.id AND
+    channel.name = "#general";
+
+SELECT message_table.content FROM message_table, user
+    WHERE message_table.author_id = user.id AND user.name = "Alice";
+
+SELECT message_table.content FROM message_table, user, channel
+    WHERE message_table.author_id = user.id AND 
+    message_table.channel_id = channel.id AND
+    user.name = "Bob" AND
+    channel.name = "#random";
+
+SELECT name AS "User Name", COUNT(*) AS "Message Count" FROM message_table, user
+    WHERE message_table.author_id = user.id
+    GROUP BY author_id
+    ORDER BY user.name DESC;