feat: add sql solution to lc problem: No.0578 (doocs#796)

No.0578.Get Highest Answer Rate Question

Co-authored-by: John Law <johnlaw.po@gmail.com>

Author: Dhoni77

solution/0500-0599/0578.Get Highest Answer Rate Question/README.md

@@ -73,7 +73,11 @@ SurveyLog table:
 ### **SQL**
 
 ```sql
-
+SELECT question_id AS survey_log
+FROM   SurveyLog
+GROUP  BY 1
+ORDER  BY SUM(action = 'answer') / SUM(action = 'show') DESC
+LIMIT  1; 
 ```
 
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solution/0500-0599/0578.Get Highest Answer Rate Question/README_EN.md

@@ -64,7 +64,11 @@ Question 285 has the highest answer rate.</pre>
 ### **SQL**
 
 ```sql
-
+SELECT question_id AS survey_log
+FROM   SurveyLog
+GROUP  BY 1
+ORDER  BY SUM(action = 'answer') / SUM(action = 'show') DESC
+LIMIT  1; 
 ```
 
 <!-- tabs:end -->

solution/0500-0599/0578.Get Highest Answer Rate Question/Solution.sql

@@ -0,0 +1,5 @@
+SELECT question_id AS survey_log
+FROM   SurveyLog
+GROUP  BY 1
+ORDER  BY SUM(action = 'answer') / SUM(action = 'show') DESC
+LIMIT  1;