feat: add sql solution to lc problem: No.0534 (doocs#780)

No.0534.Game Play Analysis III

Author: Dhoni77

solution/0500-0599/0534.Game Play Analysis III/README.md

@@ -64,7 +64,12 @@ Result table:
 ### **SQL**
 
 ```sql
-
+SELECT
+  player_id,
+  event_date,
+  SUM(games_played) OVER (PARTITION BY player_id ORDER BY event_date) AS games_played_so_far
+FROM Activity
+ORDER BY 1, 2;
 ```
 
 <!-- tabs:end -->

solution/0500-0599/0534.Game Play Analysis III/README_EN.md

@@ -66,7 +66,12 @@ Note that for each player we only care about the days when the player logged in.
 ### **SQL**
 
 ```sql
-
+SELECT
+  player_id,
+  event_date,
+  SUM(games_played) OVER (PARTITION BY player_id ORDER BY event_date) AS games_played_so_far
+FROM Activity
+ORDER BY 1, 2;
 ```
 
 <!-- tabs:end -->

solution/0500-0599/0534.Game Play Analysis III/Solution.sql

@@ -0,0 +1,6 @@
+SELECT
+  player_id,
+  event_date,
+  SUM(games_played) OVER (PARTITION BY player_id ORDER BY event_date) AS games_played_so_far
+FROM Activity
+ORDER BY 1, 2;