feat: add solutions to lc problems: No.1747,1783

* No.1747.Leetflex Banned Accounts
* No.1783.Grand Slam Titles

Author: yanglbme

Diff for: solution/1700-1799/1747.Leetflex Banned Accounts/README.md

@@ -71,7 +71,15 @@ Account ID 4 --> 该账户从 "2021-02-01 17:00:00" 到 "2021-02-01 17:00:00"
 ### **SQL**
 
 ```sql
-
+# Write your MySQL query statement below
+select
+    distinct a.account_id
+from
+    LogInfo a
+    join LogInfo b on a.account_id = b.account_id
+    and a.ip_address != b.ip_address
+    and a.login between b.login
+    and b.logout;
 ```
 
 <!-- tabs:end -->

Diff for: solution/1700-1799/1747.Leetflex Banned Accounts/README_EN.md

@@ -67,7 +67,15 @@ Account ID 4 --> The account was active from "2021-02-01 17:00:00"
 ### **SQL**
 
 ```sql
-
+# Write your MySQL query statement below
+select
+    distinct a.account_id
+from
+    LogInfo a
+    join LogInfo b on a.account_id = b.account_id
+    and a.ip_address != b.ip_address
+    and a.login between b.login
+    and b.logout;
 ```
 
 <!-- tabs:end -->

Diff for: solution/1700-1799/1747.Leetflex Banned Accounts/Solution.sql

@@ -0,0 +1,9 @@
+# Write your MySQL query statement below
+select
+    distinct a.account_id
+from
+    LogInfo a
+    join LogInfo b on a.account_id = b.account_id
+    and a.ip_address != b.ip_address
+    and a.login between b.login
+    and b.logout;

Diff for: solution/1700-1799/1783.Grand Slam Titles/README.md

@@ -88,7 +88,40 @@ Player 3 (Novak)  没有赢得，因此不包含在结果集中。</pre>
 ### **SQL**
 
 ```sql
-
+# Write your MySQL query statement below
+select
+    player_id,
+    player_name,
+    sum(
+        (
+            case
+                when Wimbledon = player_id then 1
+                else 0
+            end
+        ) + (
+            case
+                when Fr_open = player_id then 1
+                else 0
+            end
+        ) + (
+            case
+                when US_open = player_id then 1
+                else 0
+            end
+        ) + (
+            case
+                when Au_open = player_id then 1
+                else 0
+            end
+        )
+    ) grand_slams_count
+from
+    Championships
+    cross join Players
+group by
+    player_id
+having
+    grand_slams_count > 0;
 ```
 
 <!-- tabs:end -->

Diff for: solution/1700-1799/1783.Grand Slam Titles/README_EN.md

@@ -84,7 +84,40 @@ Player 3 (Novak) did not win anything, we did not include them in the result tab
 ### **SQL**
 
 ```sql
-
+# Write your MySQL query statement below
+select
+    player_id,
+    player_name,
+    sum(
+        (
+            case
+                when Wimbledon = player_id then 1
+                else 0
+            end
+        ) + (
+            case
+                when Fr_open = player_id then 1
+                else 0
+            end
+        ) + (
+            case
+                when US_open = player_id then 1
+                else 0
+            end
+        ) + (
+            case
+                when Au_open = player_id then 1
+                else 0
+            end
+        )
+    ) grand_slams_count
+from
+    Championships
+    cross join Players
+group by
+    player_id
+having
+    grand_slams_count > 0;
 ```
 
 <!-- tabs:end -->

Diff for: solution/1700-1799/1783.Grand Slam Titles/Solution.sql

@@ -0,0 +1,34 @@
+# Write your MySQL query statement below
+select
+    player_id,
+    player_name,
+    sum(
+        (
+            case
+                when Wimbledon = player_id then 1
+                else 0
+            end
+        ) + (
+            case
+                when Fr_open = player_id then 1
+                else 0
+            end
+        ) + (
+            case
+                when US_open = player_id then 1
+                else 0
+            end
+        ) + (
+            case
+                when Au_open = player_id then 1
+                else 0
+            end
+        )
+    ) grand_slams_count
+from
+    Championships
+    cross join Players
+group by
+    player_id
+having
+    grand_slams_count > 0;