LeetCode 1050~1077 mysql

Author: LjyYano

solution/1000-1099/1068.Product Sales Analysis I/README.md

@@ -10,26 +10,17 @@ None
 ## 解法
 <!-- 这里可写通用的实现逻辑 -->
 
-
 <!-- tabs:start -->
 
-### **Python3**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
-
-```python
+### **SQL**
 
 ```
-
-### **Java**
-<!-- 这里可写当前语言的特殊实现逻辑 -->
-
-```java
-
-```
-
-### **...**
-```
-
+SELECT p.product_name,
+         s.year,
+         s.price
+FROM Sales s
+JOIN Product p
+    ON s.product_id = p.product_id
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/1000-1099/1068.Product Sales Analysis I/README_EN.md

@@ -11,21 +11,15 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
-
+SELECT p.product_name,
+         s.year,
+         s.price
+FROM Sales s
+JOIN Product p
+    ON s.product_id = p.product_id
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/1000-1099/1068.Product Sales Analysis I/Solution.sql

@@ -0,0 +1,6 @@
+SELECT p.product_name,
+         s.year,
+         s.price
+FROM Sales s
+JOIN Product p
+    ON s.product_id = p.product_id

solution/1000-1099/1069.Product Sales Analysis II/README.md

@@ -13,23 +13,13 @@ 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 product_id,
+         sum(quantity) AS total_quantity
+FROM Sales
+GROUP BY  product_id
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/1000-1099/1069.Product Sales Analysis II/README_EN.md

@@ -8,24 +8,15 @@ None
 
 ## Solutions
 
-
 <!-- tabs:start -->
 
-### **Python3**
-
-```python
+### **SQL**
 
 ```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
-```
-
+SELECT product_id,
+         sum(quantity) AS total_quantity
+FROM Sales
+GROUP BY  product_id
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/1000-1099/1069.Product Sales Analysis II/Solution.sql

@@ -0,0 +1,4 @@
+SELECT product_id,
+         sum(quantity) AS total_quantity
+FROM Sales
+GROUP BY  product_id

solution/1000-1099/1070.Product Sales Analysis III/README.md

@@ -13,23 +13,19 @@ 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 s.product_id,
+         s.year AS first_year,
+         s.quantity,
+         s.price
+FROM Sales s
+WHERE (product_id, year) IN 
+    (SELECT product_id,
+         min(year)
+    FROM Sales
+    GROUP BY  product_id)
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/1000-1099/1070.Product Sales Analysis III/README_EN.md

@@ -11,21 +11,19 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
-
+SELECT s.product_id,
+         s.year AS first_year,
+         s.quantity,
+         s.price
+FROM Sales s
+WHERE (product_id, year) IN 
+    (SELECT product_id,
+         min(year)
+    FROM Sales
+    GROUP BY  product_id)
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/1000-1099/1070.Product Sales Analysis III/Solution.sql

@@ -0,0 +1,10 @@
+SELECT s.product_id,
+         s.year AS first_year,
+         s.quantity,
+         s.price
+FROM Sales s
+WHERE (product_id, year) IN
+    (SELECT product_id,
+         min(year)
+    FROM Sales
+    GROUP BY  product_id)

solution/1000-1099/1075.Project Employees I/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 p.project_id,
+         round(avg(e.experience_years),
+        2) AS average_years
+FROM Project p
+JOIN Employee e
+    ON p.employee_id = e.employee_id
+GROUP BY  p.project_id
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/1000-1099/1075.Project Employees I/README_EN.md

@@ -11,21 +11,16 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
-
+SELECT p.project_id,
+         round(avg(e.experience_years),
+        2) AS average_years
+FROM Project p
+JOIN Employee e
+    ON p.employee_id = e.employee_id
+GROUP BY  p.project_id
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/1000-1099/1075.Project Employees I/Solution.sql

@@ -0,0 +1,7 @@
+SELECT p.project_id,
+         round(avg(e.experience_years),
+        2) AS average_years
+FROM Project p
+JOIN Employee e
+    ON p.employee_id = e.employee_id
+GROUP BY  p.project_id

solution/1000-1099/1076.Project Employees II/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 project_id
+FROM Project
+GROUP BY  project_id
+HAVING count(*) >= all
+    (SELECT count(*)
+    FROM Project
+    GROUP BY  project_id )
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/1000-1099/1076.Project Employees II/README_EN.md

@@ -11,21 +11,16 @@ None
 
 <!-- tabs:start -->
 
-### **Python3**
+### **SQL**
 
-```python
-
-```
-
-### **Java**
-
-```java
-
-```
-
-### **...**
 ```
-
+SELECT project_id
+FROM Project
+GROUP BY  project_id
+HAVING count(*) >= all
+    (SELECT count(*)
+    FROM Project
+    GROUP BY  project_id )
 ```
 
-<!-- tabs:end -->
+<!-- tabs:end -->

solution/1000-1099/1076.Project Employees II/Solution.sql

@@ -0,0 +1,7 @@
+SELECT project_id
+FROM Project
+GROUP BY  project_id
+HAVING count(*) >= all
+    (SELECT count(*)
+    FROM Project
+    GROUP BY  project_id )