LeetCode 500~600 mysql

Author: LjyYano

solution/0500-0599/0511.Game Play Analysis I/README.md

@@ -16,7 +16,7 @@ None
 ### **SQL**
 
 ```
-
+select player_id, min(event_date) as first_login from Activity group by player_id
 ```
 
 <!-- tabs:end -->

solution/0500-0599/0511.Game Play Analysis I/README_EN.md

@@ -14,7 +14,7 @@ None
 ### **SQL**
 
 ```
-
+select player_id, min(event_date) as first_login from Activity group by player_id
 ```
 
 <!-- tabs:end -->

solution/0500-0599/0511.Game Play Analysis I/Solution.sql

@@ -0,0 +1 @@
+select player_id, min(event_date) as first_login from Activity group by player_id

solution/0500-0599/0512.Game Play Analysis II/README.md

@@ -13,23 +13,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
-
-```java
-
-```
-
-### **...**
 ```
-
+select player_id, device_id from Activity where (player_id, event_date) in ((select player_id, min(event_date) from Activity group by player_id))
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0512.Game Play Analysis II/README_EN.md

@@ -11,21 +11,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
-
+select player_id, device_id from Activity where (player_id, event_date) in ((select player_id, min(event_date) from Activity group by player_id))
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0512.Game Play Analysis II/Solution.sql

@@ -0,0 +1 @@
+select player_id, device_id from Activity where (player_id, event_date) in ((select player_id, min(event_date) from Activity group by player_id))

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

@@ -13,23 +13,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
-
-```java
-
-```
-
-### **...**
 ```
-
+select a.player_id, a.event_date, sum(b.games_played) as games_played_so_far from Activity a, Activity b where a.player_id = b.player_id and a.event_date >= b.event_date group by a.player_id, a.event_date
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

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

@@ -11,21 +11,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
-
+select a.player_id, a.event_date, sum(b.games_played) as games_played_so_far from Activity a, Activity b where a.player_id = b.player_id and a.event_date >= b.event_date group by a.player_id, a.event_date
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

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

@@ -0,0 +1 @@
+select a.player_id, a.event_date, sum(b.games_played) as games_played_so_far from Activity a, Activity b where a.player_id = b.player_id and a.event_date >= b.event_date group by a.player_id, a.event_date

solution/0500-0599/0550.Game Play Analysis IV/README.md

@@ -13,23 +13,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
-
-```java
-
-```
-
-### **...**
 ```
 
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0550.Game Play Analysis IV/README_EN.md

@@ -11,21 +11,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
 
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0570.Managers with at Least 5 Direct Reports/README.md

@@ -13,23 +13,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
-
-```java
-
-```
-
-### **...**
 ```
 
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0570.Managers with at Least 5 Direct Reports/README_EN.md

@@ -11,21 +11,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
 
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0574.Winning Candidate/README.md

@@ -13,23 +13,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
-
-```java
-
-```
-
-### **...**
 ```
 
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0574.Winning Candidate/README_EN.md

@@ -11,21 +11,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
 
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0579.Find Cumulative Salary of an Employee/README.md

@@ -13,23 +13,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
-
-```java
-
-```
-
-### **...**
 ```
 
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0579.Find Cumulative Salary of an Employee/README_EN.md

@@ -11,21 +11,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
 
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0584.Find Customer Referee/README.md

@@ -13,23 +13,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
-
-```java
-
-```
-
-### **...**
 ```
 
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/0500-0599/0584.Find Customer Referee/README_EN.md

@@ -11,21 +11,10 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
 
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->