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Commit ac50eef

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feat: update solutions to lc problems: No.0183,0584,0595,1757
- No.0183.Customers Who Never Order - No.0584.Find Customer Referee - No.0595.Big Countries - No.1757.Recyclable and Low Fat Products
1 parent 92539a3 commit ac50eef

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-39
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‎solution/0100-0199/0183.Customers Who Never Order/README.md‎

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### **SQL**
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```sql
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select Name as Customers from Customers
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where id not in (select CustomerId from Orders)
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select Name as Customers
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from Customers
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where id not in (
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select CustomerId
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from Orders
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);
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```
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```sql
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# Write your MySQL query statement below
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SELECT
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c.Name AS Customers
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c.Name AS Customers
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FROM
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customers AS c
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LEFT JOIN orders AS o ON c.Id = o.CustomerId
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customers AS c
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LEFT JOIN orders AS o ON c.Id = o.CustomerId
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WHERE
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o.CustomerId IS NULL
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o.CustomerId IS NULL;
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```
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<!-- tabs:end -->

‎solution/0100-0199/0183.Customers Who Never Order/README_EN.md‎

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### **SQL**
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```sql
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select Name as Customers from Customers
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where id not in (select CustomerId from Orders)
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select Name as Customers
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from Customers
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where id not in (
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select CustomerId
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from Orders
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);
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```
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```sql
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# Write your MySQL query statement below
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SELECT
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c.Name AS Customers
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c.Name AS Customers
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FROM
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customers AS c
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LEFT JOIN orders AS o ON c.Id = o.CustomerId
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customers AS c
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LEFT JOIN orders AS o ON c.Id = o.CustomerId
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WHERE
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o.CustomerId IS NULL
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o.CustomerId IS NULL;
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```
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<!-- tabs:end -->
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select Name as Customers from Customers
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where id not in (select CustomerId from Orders)
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select Name as Customers
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from Customers
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where id not in (
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select CustomerId
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from Orders
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);

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

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referee_id != 2 OR referee_id IS NULL;
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```
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MySQL 可使用 `IFNULL()`:
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```sql
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SELECT
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name
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FROM
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customer
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WHERE
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IFNULL(referee_id, 0) != 2;
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```
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<!-- tabs:end -->

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

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referee_id != 2 OR referee_id IS NULL;
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```
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MySQL can use `IFNULL()`:
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```sql
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SELECT
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name
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FROM
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customer
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WHERE
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IFNULL(referee_id, 0) != 2;
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```
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<!-- tabs:end -->

‎solution/0500-0599/0595.Big Countries/README.md‎

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### **SQL**
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```
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```sql
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SELECT name,
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population,
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area
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FROM World
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WHERE area>3000000
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OR population>25000000
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population,
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area
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FROM world
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WHERE area>3000000
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OR population>25000000;
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```
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<!-- tabs:end -->

‎solution/0500-0599/0595.Big Countries/README_EN.md‎

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### **SQL**
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```
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```sql
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SELECT name,
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population,
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area
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FROM World
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WHERE area>3000000
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OR population>25000000
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population,
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area
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FROM world
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WHERE area>3000000
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OR population>25000000;
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```
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<!-- tabs:end -->
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SELECT name,
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population,
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area
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FROM World
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WHERE area>3000000
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OR population>25000000
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population,
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area
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FROM world
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WHERE area>3000000
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OR population>25000000;

‎solution/1700-1799/1757.Recyclable and Low Fat Products/README.md‎

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### **SQL**
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```sql
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# Write your MySQL query statement below
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SELECT
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product_id
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FROM
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Products
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WHERE
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low_fats = 'Y'
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AND recyclable = 'Y';
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AND recyclable = 'Y';
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```
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<!-- tabs:end -->

‎solution/1700-1799/1757.Recyclable and Low Fat Products/README_EN.md‎

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### **SQL**
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```sql
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# Write your MySQL query statement below
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SELECT
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product_id
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FROM
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Products
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WHERE
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low_fats = 'Y'
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AND recyclable = 'Y';
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AND recyclable = 'Y';
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```
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<!-- tabs:end -->

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