feat: add sql solution to lc problems: No.1141,1693,1729

- No.1141.User Activity for the Past 30 Days I
- No.1693.Daily Leads and Partners
- No.1729.Find Followers Count

Author: YangFong

solution/1100-1199/1141.User Activity for the Past 30 Days I/README.md

@@ -71,7 +71,15 @@ Activity table:
 ### **SQL**
 
 ```sql
-
+SELECT
+    activity_date AS day,
+    COUNT(DISTINCT user_id) AS active_users
+FROM
+    Activity
+WHERE
+    DATEDIFF('2019-07-27', activity_date) < 30
+GROUP BY
+    activity_date;
 ```
 
 <!-- tabs:end -->

solution/1100-1199/1141.User Activity for the Past 30 Days I/README_EN.md

@@ -67,7 +67,15 @@ Activity table:
 ### **SQL**
 
 ```sql
-
+SELECT
+    activity_date AS day,
+    COUNT(DISTINCT user_id) AS active_users
+FROM
+    Activity
+WHERE
+    DATEDIFF('2019-07-27', activity_date) < 30
+GROUP BY
+    activity_date;
 ```
 
 <!-- tabs:end -->

solution/1100-1199/1141.User Activity for the Past 30 Days I/Solution.sql

@@ -0,0 +1,9 @@
+SELECT
+    activity_date AS day,
+    COUNT(DISTINCT user_id) AS active_users
+FROM
+    Activity
+WHERE
+    DATEDIFF('2019-07-27', activity_date) < 30
+GROUP BY
+    activity_date;

solution/1600-1699/1693.Daily Leads and Partners/README.md

@@ -68,7 +68,13 @@
 ### **SQL**
 
 ```sql
-
+SELECT date_id,
+    make_name,
+    COUNT(DISTINCT lead_id) AS unique_leads,
+    COUNT(DISTINCT partner_id) AS unique_partners
+FROM DailySales
+GROUP BY date_id,
+    make_name;
 ```
 
 <!-- tabs:end -->

solution/1600-1699/1693.Daily Leads and Partners/README_EN.md

@@ -69,7 +69,13 @@ For 2020-12-7, toyota gets leads = [0] and partners = [1, 2] while honda gets le
 ### **SQL**
 
 ```sql
-
+SELECT date_id,
+    make_name,
+    COUNT(DISTINCT lead_id) AS unique_leads,
+    COUNT(DISTINCT partner_id) AS unique_partners
+FROM DailySales
+GROUP BY date_id,
+    make_name;
 ```
 
 <!-- tabs:end -->

solution/1600-1699/1693.Daily Leads and Partners/Solution.sql

@@ -0,0 +1,7 @@
+SELECT date_id,
+    make_name,
+    COUNT(DISTINCT lead_id) AS unique_leads,
+    COUNT(DISTINCT partner_id) AS unique_partners
+FROM DailySales
+GROUP BY date_id,
+    make_name;

solution/1700-1799/1729.Find Followers Count/README.md

@@ -60,15 +60,15 @@
 ### **SQL**
 
 ```sql
-# Write your MySQL query statement below
 SELECT
-    user_id, count(1) AS followers_count
+    user_id,
+    count(1) AS followers_count
 FROM
     Followers
 GROUP BY
     user_id
 ORDER BY
-    user_id
+    user_id;
 ```
 
 <!-- tabs:end -->

solution/1700-1799/1729.Find Followers Count/README_EN.md

@@ -59,15 +59,15 @@ The followers of 2 are {0,1}
 ### **SQL**
 
 ```sql
-# Write your MySQL query statement below
 SELECT
-    user_id, count(1) AS followers_count
+    user_id,
+    count(1) AS followers_count
 FROM
     Followers
 GROUP BY
     user_id
 ORDER BY
-    user_id
+    user_id;
 ```
 
 <!-- tabs:end -->

solution/1700-1799/1729.Find Followers Count/Solution.sql

@@ -1,6 +1,6 @@
-# Write your MySQL query statement below
 SELECT
-    user_id, count(1) AS followers_count
+    user_id,
+    count(1) AS followers_count
 FROM
     Followers
 GROUP BY