Create result views to database schema

src/lib/database.sql

@@ -10,6 +10,8 @@ DROP TABLE IF EXISTS Song;
 DROP TABLE IF EXISTS "User"; -- Quoted because USER is a reserved keyword
 DROP TABLE IF EXISTS Team;
 DROP TABLE IF EXISTS CountryCodes;
+DROP VIEW IF EXISTS ReviewSummary;
+DROP VIEW IF EXISTS ReviewSummaryByTeam;
 
 DROP SEQUENCE IF EXISTS group_id_seq;
 DROP SEQUENCE IF EXISTS user_id_seq;
@@ -42,6 +44,8 @@ CREATE TABLE "Team" (
 CREATE TABLE "User" (
     id INTEGER PRIMARY KEY DEFAULT nextval('user_id_seq'), -- Use sequence for auto-increment
     username VARCHAR UNIQUE NOT NULL,                       -- The user's login name
+    first_name VARCHAR DEFAULT '',
+    last_name VARCHAR DEFAULT '',
     hashed_password VARCHAR NOT NULL,                       -- The securely hashed password
     email VARCHAR UNIQUE,                                   -- User's email address (nullable)
     team_id INTEGER NOT NULL,                              -- Foreign Key -> Group.id
@@ -115,6 +119,31 @@ CREATE TABLE CountryCodes (
     name_sv VARCHAR NOT NULL
 );
 
+CREATE VIEW ReviewSummaryGlobal AS
+SELECT 
+    song_id,
+    COUNT(*) AS total_reviews,
+    AVG(score_song) AS avg_score_song,
+    AVG(score_show) AS avg_score_show,
+    AVG(score_costume) AS avg_score_costume,
+    AVG((score_song + score_show + score_costume)/3) AS avg_total_score
+FROM Review
+GROUP BY song_id;
+
+CREATE VIEW ReviewSummaryByTeam AS
+SELECT 
+    r.song_id,
+    u.team_id,
+    AVG(r.score_song) AS avg_score_song,
+    AVG(r.score_show) AS avg_score_show,
+    AVG(r.score_costume) AS avg_score_costume,
+    AVG((r.score_song + r.score_show + r.score_costume)/3) AS avg_total_score
+FROM Review r
+JOIN "User" u ON r.user_id = u.id
+JOIN Song s ON r.song_id = s.id
+GROUP BY r.song_id, u.team_id
+ORDER BY r.song_id, u.team_id;
+
 -- Insert country codes data
 INSERT INTO CountryCodes (code, name_en, name_fi, name_sv) VALUES ('ALB', 'Albania', 'Albania', 'Albanien');
 INSERT INTO CountryCodes (code, name_en, name_fi, name_sv) VALUES ('ARM', 'Armenia', 'Armenia', 'Armenien');