feat: add sql solution to lc problem: No.1322

solution/1300-1399/1322.Ads Performance/README.md

@@ -89,10 +89,23 @@ SELECT
     WHEN action = 'Viewed' THEN 0
     ELSE NULL
   END) * 100, 2), 0) AS ctr
-FROM ads
+FROM Ads
 GROUP BY ad_id
 ORDER BY ctr DESC,
 ad_id ASC;
 ```
 
+```sql
+SELECT ad_id,
+    ROUND(
+         IFNULL(
+             SUM(action='Clicked') / SUM(action IN ('Clicked', 'Viewed')) * 100
+             , 0)
+         , 2)
+        AS ctr
+FROM Ads
+GROUP BY ad_id
+ORDER BY 2 DESC, 1;
+```
+
 <!-- tabs:end -->

solution/1300-1399/1322.Ads Performance/README_EN.md

@@ -82,10 +82,23 @@ SELECT
     WHEN action = 'Viewed' THEN 0
     ELSE NULL
   END) * 100, 2), 0) AS ctr
-FROM ads
+FROM Ads
 GROUP BY ad_id
 ORDER BY ctr DESC,
 ad_id ASC;
 ```
 
+```sql
+SELECT ad_id,
+    ROUND(
+         IFNULL(
+             SUM(action='Clicked') / SUM(action IN ('Clicked', 'Viewed')) * 100
+             , 0)
+         , 2)
+        AS ctr
+FROM Ads
+GROUP BY ad_id
+ORDER BY 2 DESC, 1;
+```
+
 <!-- tabs:end -->

solution/1300-1399/1322.Ads Performance/Solution.sql

@@ -14,6 +14,6 @@ SELECT
         ),
         0
     ) AS ctr
-FROM ads
+FROM Ads
 GROUP BY ad_id
 ORDER BY ctr DESC, ad_id ASC;