Added sample files

samples/SQL/videodb.cql

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+CREATE KEYSPACE videodb WITH REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };
+
+use videodb;
+
+// Basic entity table
+// Object mapping ?
+CREATE TABLE users (
+   username varchar,
+   firstname varchar,
+   lastname varchar,
+   email varchar,
+   password varchar,
+   created_date timestamp,
+   total_credits int,
+   credit_change_date timeuuid,
+   PRIMARY KEY (username)
+);
+
+// One-to-many entity table
+CREATE TABLE videos (
+   videoid uuid,
+   videoname varchar,
+   username varchar,
+   description varchar, 
+   tags list<varchar>,
+   upload_date timestamp,
+   PRIMARY KEY (videoid)
+);
+
+// One-to-many from the user point of view
+// Also know as a lookup table
+CREATE TABLE username_video_index (
+   username varchar,
+   videoid uuid,
+   upload_date timestamp,
+   videoname varchar,
+   PRIMARY KEY (username, videoid)
+);
+
+// Counter table
+CREATE TABLE video_rating (
+   videoid uuid,
+   rating_counter counter,
+   rating_total counter,
+   PRIMARY KEY (videoid)
+);
+
+// Creating index tables for tab keywords
+CREATE TABLE tag_index (
+   tag varchar, 
+   videoid uuid,
+   timestamp timestamp,
+   PRIMARY KEY (tag, videoid)
+);
+
+// Comments as a many-to-many 
+// Looking from the video side to many users
+CREATE TABLE comments_by_video (
+   videoid uuid,
+   username varchar,
+   comment_ts timestamp,
+   comment varchar,
+   PRIMARY KEY (videoid,comment_ts,username)
+) WITH CLUSTERING ORDER BY (comment_ts DESC, username ASC);
+
+// looking from the user side to many videos
+CREATE TABLE comments_by_user (
+   username varchar,
+   videoid uuid,
+   comment_ts timestamp,
+   comment varchar,
+   PRIMARY KEY (username,comment_ts,videoid)
+) WITH CLUSTERING ORDER BY (comment_ts DESC, videoid ASC);
+
+
+// Time series wide row with reverse comparator
+CREATE TABLE video_event (
+   videoid uuid,
+   username varchar,
+   event varchar,
+   event_timestamp timeuuid,
+   video_timestamp bigint,
+   PRIMARY KEY ((videoid,username), event_timestamp,event)
+) WITH CLUSTERING ORDER BY (event_timestamp DESC,event ASC);
+

samples/SQL/videodb.ddl

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+CREATE KEYSPACE videodb WITH REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };
+
+use videodb;
+
+// Basic entity table
+// Object mapping ?
+CREATE TABLE users (
+   username varchar,
+   firstname varchar,
+   lastname varchar,
+   email varchar,
+   password varchar,
+   created_date timestamp,
+   total_credits int,
+   credit_change_date timeuuid,
+   PRIMARY KEY (username)
+);
+
+// One-to-many entity table
+CREATE TABLE videos (
+   videoid uuid,
+   videoname varchar,
+   username varchar,
+   description varchar, 
+   tags list<varchar>,
+   upload_date timestamp,
+   PRIMARY KEY (videoid)
+);
+
+// One-to-many from the user point of view
+// Also know as a lookup table
+CREATE TABLE username_video_index (
+   username varchar,
+   videoid uuid,
+   upload_date timestamp,
+   videoname varchar,
+   PRIMARY KEY (username, videoid)
+);
+
+// Counter table
+CREATE TABLE video_rating (
+   videoid uuid,
+   rating_counter counter,
+   rating_total counter,
+   PRIMARY KEY (videoid)
+);
+
+// Creating index tables for tab keywords
+CREATE TABLE tag_index (
+   tag varchar, 
+   videoid uuid,
+   timestamp timestamp,
+   PRIMARY KEY (tag, videoid)
+);
+
+// Comments as a many-to-many 
+// Looking from the video side to many users
+CREATE TABLE comments_by_video (
+   videoid uuid,
+   username varchar,
+   comment_ts timestamp,
+   comment varchar,
+   PRIMARY KEY (videoid,comment_ts,username)
+) WITH CLUSTERING ORDER BY (comment_ts DESC, username ASC);
+
+// looking from the user side to many videos
+CREATE TABLE comments_by_user (
+   username varchar,
+   videoid uuid,
+   comment_ts timestamp,
+   comment varchar,
+   PRIMARY KEY (username,comment_ts,videoid)
+) WITH CLUSTERING ORDER BY (comment_ts DESC, videoid ASC);
+
+
+// Time series wide row with reverse comparator
+CREATE TABLE video_event (
+   videoid uuid,
+   username varchar,
+   event varchar,
+   event_timestamp timeuuid,
+   video_timestamp bigint,
+   PRIMARY KEY ((videoid,username), event_timestamp,event)
+) WITH CLUSTERING ORDER BY (event_timestamp DESC,event ASC);
+