LeetCode 500~600 mysql

LjyYano · LjyYano · commit 4ea9e0260a10 · 2020-08-12T18:27:01.000+08:00
diff --git a/solution/0500-0599/0550.Game Play Analysis IV/README.md b/solution/0500-0599/0550.Game Play Analysis IV/README.md
@@ -16,7 +16,10 @@ None
 ### **SQL**
 
 ```
-
+(select round(count(distinct (b.player_id)) / (select count(distinct (player_id)) from Activity), 2) as fraction
+ from Activity a
+          left join (select player_id, min(event_date) as first_date from Activity group by player_id) as b
+                    on a.player_id = b.player_id and datediff(a.event_date, b.first_date) = 1)
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0550.Game Play Analysis IV/README_EN.md b/solution/0500-0599/0550.Game Play Analysis IV/README_EN.md
@@ -14,7 +14,10 @@ None
 ### **SQL**
 
 ```
-
+(select round(count(distinct (b.player_id)) / (select count(distinct (player_id)) from Activity), 2) as fraction
+ from Activity a
+          left join (select player_id, min(event_date) as first_date from Activity group by player_id) as b
+                    on a.player_id = b.player_id and datediff(a.event_date, b.first_date) = 1)
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0550.Game Play Analysis IV/Solution.sql b/solution/0500-0599/0550.Game Play Analysis IV/Solution.sql
@@ -0,0 +1,4 @@
+(select round(count(distinct (b.player_id)) / (select count(distinct (player_id)) from Activity), 2) as fraction
+ from Activity a
+          left join (select player_id, min(event_date) as first_date from Activity group by player_id) as b
+                    on a.player_id = b.player_id and datediff(a.event_date, b.first_date) = 1)
diff --git a/solution/0500-0599/0570.Managers with at Least 5 Direct Reports/README.md b/solution/0500-0599/0570.Managers with at Least 5 Direct Reports/README.md
@@ -16,7 +16,13 @@ None
 ### **SQL**
 
 ```
-
+SELECT Name
+FROM Employee
+WHERE Id IN 
+    (SELECT ManagerId
+    FROM Employee
+    GROUP BY  ManagerId
+    HAVING count(*) >= 5)
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0570.Managers with at Least 5 Direct Reports/README_EN.md b/solution/0500-0599/0570.Managers with at Least 5 Direct Reports/README_EN.md
@@ -14,7 +14,13 @@ None
 ### **SQL**
 
 ```
-
+SELECT Name
+FROM Employee
+WHERE Id IN 
+    (SELECT ManagerId
+    FROM Employee
+    GROUP BY  ManagerId
+    HAVING count(*) >= 5)
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0570.Managers with at Least 5 Direct Reports/Solution.sql b/solution/0500-0599/0570.Managers with at Least 5 Direct Reports/Solution.sql
@@ -0,0 +1,7 @@
+SELECT Name
+FROM Employee
+WHERE Id IN
+    (SELECT ManagerId
+    FROM Employee
+    GROUP BY  ManagerId
+    HAVING count(*) >= 5)
diff --git a/solution/0500-0599/0574.Winning Candidate/README.md b/solution/0500-0599/0574.Winning Candidate/README.md
@@ -16,7 +16,14 @@ None
 ### **SQL**
 
 ```
-
+SELECT Name
+FROM Candidate, 
+    (SELECT CandidateId,
+         count(*) AS total
+    FROM Vote
+    GROUP BY  CandidateId
+    ORDER BY  total DESC limit 1) AS tmp
+WHERE Candidate.id = tmp.CandidateId
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0574.Winning Candidate/README_EN.md b/solution/0500-0599/0574.Winning Candidate/README_EN.md
@@ -14,7 +14,14 @@ None
 ### **SQL**
 
 ```
-
+SELECT Name
+FROM Candidate, 
+    (SELECT CandidateId,
+         count(*) AS total
+    FROM Vote
+    GROUP BY  CandidateId
+    ORDER BY  total DESC limit 1) AS tmp
+WHERE Candidate.id = tmp.CandidateId
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0574.Winning Candidate/Solution.sql b/solution/0500-0599/0574.Winning Candidate/Solution.sql
@@ -0,0 +1,8 @@
+SELECT Name
+FROM Candidate,
+    (SELECT CandidateId,
+         count(*) AS total
+    FROM Vote
+    GROUP BY  CandidateId
+    ORDER BY  total DESC limit 1) AS tmp
+WHERE Candidate.id = tmp.CandidateId
diff --git a/solution/0500-0599/0577.Employee Bonus/README.md b/solution/0500-0599/0577.Employee Bonus/README.md
@@ -13,23 +13,16 @@ 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 name,
+         bonus
+FROM Employee e
+LEFT JOIN Bonus b
+    ON e.empId = b.empId
+WHERE (b.bonus < 1000
+        OR b.bonus is null)
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->
diff --git a/solution/0500-0599/0577.Employee Bonus/README_EN.md b/solution/0500-0599/0577.Employee Bonus/README_EN.md
@@ -11,21 +11,16 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
-
+SELECT name,
+         bonus
+FROM Employee e
+LEFT JOIN Bonus b
+    ON e.empId = b.empId
+WHERE (b.bonus < 1000
+        OR b.bonus is null)
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->
diff --git a/solution/0500-0599/0577.Employee Bonus/Solution.sql b/solution/0500-0599/0577.Employee Bonus/Solution.sql
@@ -0,0 +1,7 @@
+SELECT name,
+         bonus
+FROM Employee e
+LEFT JOIN Bonus b
+    ON e.empId = b.empId
+WHERE (b.bonus < 1000
+        OR b.bonus is null)
diff --git a/solution/0500-0599/0579.Find Cumulative Salary of an Employee/README.md b/solution/0500-0599/0579.Find Cumulative Salary of an Employee/README.md
@@ -16,7 +16,27 @@ None
 ### **SQL**
 
 ```
-
+SELECT
+    E1.id,
+    E1.month,
+    (IFNULL(E1.salary, 0) + IFNULL(E2.salary, 0) + IFNULL(E3.salary, 0)) AS Salary
+FROM
+    (SELECT
+        id, MAX(month) AS month
+    FROM
+        Employee
+    GROUP BY id
+    HAVING COUNT(*) > 1) AS maxmonth
+        LEFT JOIN
+    Employee E1 ON (maxmonth.id = E1.id
+        AND maxmonth.month > E1.month)
+        LEFT JOIN
+    Employee E2 ON (E2.id = E1.id
+        AND E2.month = E1.month - 1)
+        LEFT JOIN
+    Employee E3 ON (E3.id = E1.id
+        AND E3.month = E1.month - 2)
+ORDER BY id ASC , month DESC
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0579.Find Cumulative Salary of an Employee/README_EN.md b/solution/0500-0599/0579.Find Cumulative Salary of an Employee/README_EN.md
@@ -14,7 +14,27 @@ None
 ### **SQL**
 
 ```
-
+SELECT
+    E1.id,
+    E1.month,
+    (IFNULL(E1.salary, 0) + IFNULL(E2.salary, 0) + IFNULL(E3.salary, 0)) AS Salary
+FROM
+    (SELECT
+        id, MAX(month) AS month
+    FROM
+        Employee
+    GROUP BY id
+    HAVING COUNT(*) > 1) AS maxmonth
+        LEFT JOIN
+    Employee E1 ON (maxmonth.id = E1.id
+        AND maxmonth.month > E1.month)
+        LEFT JOIN
+    Employee E2 ON (E2.id = E1.id
+        AND E2.month = E1.month - 1)
+        LEFT JOIN
+    Employee E3 ON (E3.id = E1.id
+        AND E3.month = E1.month - 2)
+ORDER BY id ASC , month DESC
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0579.Find Cumulative Salary of an Employee/Solution.sql b/solution/0500-0599/0579.Find Cumulative Salary of an Employee/Solution.sql
@@ -0,0 +1,21 @@
+SELECT
+    E1.id,
+    E1.month,
+    (IFNULL(E1.salary, 0) + IFNULL(E2.salary, 0) + IFNULL(E3.salary, 0)) AS Salary
+FROM
+    (SELECT
+        id, MAX(month) AS month
+    FROM
+        Employee
+    GROUP BY id
+    HAVING COUNT(*) > 1) AS maxmonth
+        LEFT JOIN
+    Employee E1 ON (maxmonth.id = E1.id
+        AND maxmonth.month > E1.month)
+        LEFT JOIN
+    Employee E2 ON (E2.id = E1.id
+        AND E2.month = E1.month - 1)
+        LEFT JOIN
+    Employee E3 ON (E3.id = E1.id
+        AND E3.month = E1.month - 2)
+ORDER BY id ASC , month DESC
diff --git a/solution/0500-0599/0580.Count Student Number in Departments/README.md b/solution/0500-0599/0580.Count Student Number in Departments/README.md
@@ -13,23 +13,20 @@ 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 dept_name,
+        ifnull(total,
+        0) AS student_number
+FROM department
+LEFT JOIN 
+    (SELECT dept_id,
+         count(*) AS total
+    FROM student
+    GROUP BY  dept_id) tmp
+    ON department.dept_id = tmp.dept_id
+ORDER BY  tmp.total desc
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->
diff --git a/solution/0500-0599/0580.Count Student Number in Departments/README_EN.md b/solution/0500-0599/0580.Count Student Number in Departments/README_EN.md
@@ -11,21 +11,20 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
-
+SELECT dept_name,
+        ifnull(total,
+        0) AS student_number
+FROM department
+LEFT JOIN 
+    (SELECT dept_id,
+         count(*) AS total
+    FROM student
+    GROUP BY  dept_id) tmp
+    ON department.dept_id = tmp.dept_id
+ORDER BY  tmp.total desc
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->
diff --git a/solution/0500-0599/0580.Count Student Number in Departments/Solution.sql b/solution/0500-0599/0580.Count Student Number in Departments/Solution.sql
@@ -0,0 +1,11 @@
+SELECT dept_name,
+        ifnull(total,
+        0) AS student_number
+FROM department
+LEFT JOIN
+    (SELECT dept_id,
+         count(*) AS total
+    FROM student
+    GROUP BY  dept_id) tmp
+    ON department.dept_id = tmp.dept_id
+ORDER BY  tmp.total desc
diff --git a/solution/0500-0599/0584.Find Customer Referee/README.md b/solution/0500-0599/0584.Find Customer Referee/README.md
@@ -16,7 +16,10 @@ None
 ### **SQL**
 
 ```
-
+SELECT name
+FROM customer
+WHERE referee_id != 2
+        OR referee_id is null
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0584.Find Customer Referee/README_EN.md b/solution/0500-0599/0584.Find Customer Referee/README_EN.md
@@ -14,7 +14,10 @@ None
 ### **SQL**
 
 ```
-
+SELECT name
+FROM customer
+WHERE referee_id != 2
+        OR referee_id is null
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0584.Find Customer Referee/Solution.sql b/solution/0500-0599/0584.Find Customer Referee/Solution.sql
@@ -0,0 +1,4 @@
+SELECT name
+FROM customer
+WHERE referee_id != 2
+        OR referee_id is null
diff --git a/solution/0500-0599/0586.Customer Placing the Largest Number of Orders/README.md b/solution/0500-0599/0586.Customer Placing the Largest Number of Orders/README.md
@@ -16,7 +16,13 @@ None
 ### **SQL**
 
 ```
-
+SELECT customer_number
+FROM 
+    (SELECT customer_number,
+         count(*) AS total
+    FROM orders
+    GROUP BY  customer_number
+    ORDER BY  total DESC limit 1) tmp
 ```
 
 <!-- tabs:end -->
diff --git a/solution/0500-0599/0586.Customer Placing the Largest Number of Orders/README_EN.md b/solution/0500-0599/0586.Customer Placing the Largest Number of Orders/README_EN.md
diff --git a/solution/0500-0599/0586.Customer Placing the Largest Number of Orders/Solution.sql b/solution/0500-0599/0586.Customer Placing the Largest Number of Orders/Solution.sql
diff --git a/solution/0500-0599/0595.Big Countries/README.md b/solution/0500-0599/0595.Big Countries/README.md
diff --git a/solution/0500-0599/0595.Big Countries/README_EN.md b/solution/0500-0599/0595.Big Countries/README_EN.md
diff --git a/solution/0500-0599/0595.Big Countries/Solution.sql b/solution/0500-0599/0595.Big Countries/Solution.sql
diff --git a/solution/0500-0599/0597.Friend Requests I Overall Acceptance Rate/README.md b/solution/0500-0599/0597.Friend Requests I Overall Acceptance Rate/README.md
diff --git a/solution/0500-0599/0597.Friend Requests I Overall Acceptance Rate/README_EN.md b/solution/0500-0599/0597.Friend Requests I Overall Acceptance Rate/README_EN.md
diff --git a/solution/0500-0599/0597.Friend Requests I Overall Acceptance Rate/Solution.sql b/solution/0500-0599/0597.Friend Requests I Overall Acceptance Rate/Solution.sql
diff --git a/solution/0600-0699/0602.Friend Requests II Who Has the Most Friends/README.md b/solution/0600-0699/0602.Friend Requests II Who Has the Most Friends/README.md
diff --git a/solution/0600-0699/0602.Friend Requests II Who Has the Most Friends/README_EN.md b/solution/0600-0699/0602.Friend Requests II Who Has the Most Friends/README_EN.md
diff --git a/solution/0600-0699/0602.Friend Requests II Who Has the Most Friends/Solution.sql b/solution/0600-0699/0602.Friend Requests II Who Has the Most Friends/Solution.sql
