added releaseYears canned query

web/index.html

@@ -158,6 +158,7 @@
 					<li><a href="#" class="query-console-sample" data-query-slug="gamesWithMostReviews">Games with most reviews</a></li>
 					<li><a href="#" class="query-console-sample" data-query-slug="systemsWithMostReviews">Systems with most reviews</a></li>
 					<li><a href="#" class="query-console-sample" data-query-slug="mostReviewedDomains">Domains with most reviews</a></li>
+					<li><a href="#" class="query-console-sample" data-query-slug="releaseYears">Games per year</a></li>
 				</ul>
 
 				<hr />
@@ -166,6 +167,7 @@
 				<div style="text-align: center">
 					<button id="query-console-run">Run</button>
 				</div>
+
 				<div id="query-console-result-container" style="display: none">
 					<hr />
 					<div class="query-console-elapsed"></div>
@@ -786,6 +788,38 @@ from reviews
 where Link like 'https://%'
 group by 1
 order by 3 desc, 2 desc, 1`,
+
+						releaseYears: `
+with releases as (
+	select
+		GameID,
+		(ReleaseDate || '-01-01') as ReleaseDate
+	from games
+	where ReleaseDate like '____'
+	union all
+	select
+		GameID,
+		(ReleaseDate || '-01') as ReleaseDate
+	from games
+	where ReleaseDate like '____-__'
+	union all
+	select
+		GameID,
+		ReleaseDate
+	from games
+	where ReleaseDate like '____-__-__'
+)
+select
+	strftime('%Y', r.ReleaseDate) as Year,
+    count(distinct r.GameID) as NumGames,
+    avg(rev.Score) as AverageScore
+from releases r
+inner join games g
+	on g.GameID = r.GameID
+inner join reviews rev
+	on rev.GameID = g.GameID
+group by 1
+order by 1`,
 					};
 
 					const query = sampleQueries[slug];