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15 changes: 8 additions & 7 deletions solution/0100-0199/0183.Customers Who Never Order/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -57,22 +57,23 @@
### **SQL**

```sql
SELECT Name AS Customers
# Write your MySQL query statement below
SELECT name AS Customers
FROM Customers
WHERE
id NOT IN (
SELECT CustomerId
SELECT customerId
FROM Orders
);
```

```sql
SELECT
c.Name AS Customers
# Write your MySQL query statement below
SELECT name AS Customers
FROM
customers AS c
LEFT JOIN orders AS o ON c.Id = o.CustomerId
WHERE o.CustomerId IS NULL;
Customers AS c
LEFT JOIN Orders AS o ON c.id = o.customerId
WHERE o.id IS NULL;
```

<!-- tabs:end -->
15 changes: 8 additions & 7 deletions solution/0100-0199/0183.Customers Who Never Order/README_EN.md
Original file line number Diff line number Diff line change
Expand Up @@ -78,22 +78,23 @@ Orders table:
### **SQL**

```sql
SELECT Name AS Customers
# Write your MySQL query statement below
SELECT name AS Customers
FROM Customers
WHERE
id NOT IN (
SELECT CustomerId
SELECT customerId
FROM Orders
);
```

```sql
SELECT
c.Name AS Customers
# Write your MySQL query statement below
SELECT name AS Customers
FROM
customers AS c
LEFT JOIN orders AS o ON c.Id = o.CustomerId
WHERE o.CustomerId IS NULL;
Customers AS c
LEFT JOIN Orders AS o ON c.id = o.customerId
WHERE o.id IS NULL;
```

<!-- tabs:end -->
Original file line number Diff line number Diff line change
@@ -1,7 +1,8 @@
SELECT Name AS Customers
# Write your MySQL query statement below
SELECT name AS Customers
FROM Customers
WHERE
id NOT IN (
SELECT CustomerId
SELECT customerId
FROM Orders
);
13 changes: 4 additions & 9 deletions solution/0100-0199/0184.Department Highest Salary/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -122,23 +122,18 @@ WHERE
```sql
# Write your MySQL query statement below
WITH
t AS (
T AS (
SELECT
departmentId,
name,
salary,
*,
rank() OVER (
PARTITION BY departmentId
ORDER BY salary DESC
) AS rk
FROM Employee
)
SELECT
d.name AS Department,
t.name AS Employee,
salary AS Salary
SELECT d.name AS Department, t.name AS Employee, salary AS Salary
FROM
t
T AS t
JOIN Department AS d ON t.departmentId = d.id
WHERE rk = 1;
```
Expand Down
13 changes: 4 additions & 9 deletions solution/0100-0199/0184.Department Highest Salary/README_EN.md
Original file line number Diff line number Diff line change
Expand Up @@ -120,23 +120,18 @@ WHERE
```sql
# Write your MySQL query statement below
WITH
t AS (
T AS (
SELECT
departmentId,
name,
salary,
*,
rank() OVER (
PARTITION BY departmentId
ORDER BY salary DESC
) AS rk
FROM Employee
)
SELECT
d.name AS Department,
t.name AS Employee,
salary AS Salary
SELECT d.name AS Department, t.name AS Employee, salary AS Salary
FROM
t
T AS t
JOIN Department AS d ON t.departmentId = d.id
WHERE rk = 1;
```
Expand Down
13 changes: 4 additions & 9 deletions solution/0100-0199/0184.Department Highest Salary/Solution.sql
Original file line number Diff line number Diff line change
@@ -1,21 +1,16 @@
# Write your MySQL query statement below
WITH
t AS (
T AS (
SELECT
departmentId,
name,
salary,
*,
rank() OVER (
PARTITION BY departmentId
ORDER BY salary DESC
) AS rk
FROM Employee
)
SELECT
d.name AS Department,
t.name AS Employee,
salary AS Salary
SELECT d.name AS Department, t.name AS Employee, salary AS Salary
FROM
t
T AS t
JOIN Department AS d ON t.departmentId = d.id
WHERE rk = 1;
15 changes: 5 additions & 10 deletions solution/0100-0199/0185.Department Top Three Salaries/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -125,25 +125,20 @@ WHERE
```sql
# Write your MySQL query statement below
WITH
t AS (
T AS (
SELECT
departmentId,
name,
salary,
*,
dense_rank() OVER (
PARTITION BY departmentId
ORDER BY salary DESC
) AS rk
FROM Employee
)
SELECT
d.name AS Department,
t.name AS Employee,
salary AS Salary
SELECT d.name AS Department, t.name AS Employee, salary AS Salary
FROM
t
T AS t
JOIN Department AS d ON t.departmentId = d.id
WHERE rk < 4;
WHERE rk <= 3;
```

<!-- tabs:end -->
15 changes: 5 additions & 10 deletions solution/0100-0199/0185.Department Top Three Salaries/README_EN.md
Original file line number Diff line number Diff line change
Expand Up @@ -121,25 +121,20 @@ WHERE
```sql
# Write your MySQL query statement below
WITH
t AS (
T AS (
SELECT
departmentId,
name,
salary,
*,
dense_rank() OVER (
PARTITION BY departmentId
ORDER BY salary DESC
) AS rk
FROM Employee
)
SELECT
d.name AS Department,
t.name AS Employee,
salary AS Salary
SELECT d.name AS Department, t.name AS Employee, salary AS Salary
FROM
t
T AS t
JOIN Department AS d ON t.departmentId = d.id
WHERE rk < 4;
WHERE rk <= 3;
```

<!-- tabs:end -->
15 changes: 5 additions & 10 deletions solution/0100-0199/0185.Department Top Three Salaries/Solution.sql
Original file line number Diff line number Diff line change
@@ -1,21 +1,16 @@
# Write your MySQL query statement below
WITH
t AS (
T AS (
SELECT
departmentId,
name,
salary,
*,
dense_rank() OVER (
PARTITION BY departmentId
ORDER BY salary DESC
) AS rk
FROM Employee
)
SELECT
d.name AS Department,
t.name AS Employee,
salary AS Salary
SELECT d.name AS Department, t.name AS Employee, salary AS Salary
FROM
t
T AS t
JOIN Department AS d ON t.departmentId = d.id
WHERE rk < 4;
WHERE rk <= 3;
26 changes: 21 additions & 5 deletions solution/0100-0199/0196.Delete Duplicate Emails/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -61,13 +61,29 @@ Person 表:
### **SQL**

```sql
# Write your MySQL query statement below
DELETE FROM Person
WHERE
Id NOT IN (
SELECT
MIN(Id)
FROM (SELECT * FROM Person) AS p
GROUP BY p.Email
id NOT IN (SELECT min(id) FROM (SELECT * FROM Person) AS p GROUP BY email);
```

```sql
# Write your MySQL query statement below
DELETE FROM Person
WHERE
id NOT IN (
SELECT id
FROM
(
SELECT
id,
row_number() OVER (
PARTITION BY email
ORDER BY id
) AS rk
FROM Person
) AS p
WHERE rk = 1
);
```

Expand Down
26 changes: 21 additions & 5 deletions solution/0100-0199/0196.Delete Duplicate Emails/README_EN.md
Original file line number Diff line number Diff line change
Expand Up @@ -55,13 +55,29 @@ Person table:
### **SQL**

```sql
# Write your MySQL query statement below
DELETE FROM Person
WHERE
Id NOT IN (
SELECT
MIN(Id)
FROM (SELECT * FROM Person) AS p
GROUP BY p.Email
id NOT IN (SELECT min(id) FROM (SELECT * FROM Person) AS p GROUP BY email);
```

```sql
# Write your MySQL query statement below
DELETE FROM Person
WHERE
id NOT IN (
SELECT id
FROM
(
SELECT
id,
row_number() OVER (
PARTITION BY email
ORDER BY id
) AS rk
FROM Person
) AS p
WHERE rk = 1
);
```

Expand Down
8 changes: 2 additions & 6 deletions solution/0100-0199/0196.Delete Duplicate Emails/Solution.sql
Original file line number Diff line number Diff line change
@@ -1,8 +1,4 @@
# Write your MySQL query statement below
DELETE FROM Person
WHERE
Id NOT IN (
SELECT
MIN(Id)
FROM (SELECT * FROM Person) AS p
GROUP BY p.Email
);
id NOT IN (SELECT min(id) FROM (SELECT * FROM Person) AS p GROUP BY email);
12 changes: 6 additions & 6 deletions solution/0100-0199/0197.Rising Temperature/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -66,13 +66,13 @@ Weather 表:</code>
### **SQL**

```sql
SELECT w1.Id
# Write your MySQL query statement below
SELECT w1.id
FROM
Weather AS w1,
Weather AS w2
WHERE
DATEDIFF(w1.RecordDate, w2.RecordDate) = 1
AND w1.Temperature > w2.Temperature;
Weather AS w1
JOIN Weather AS w2
ON datediff(w1.recordDate, w2.recordDate) = 1
AND w1.temperature > w2.temperature;
```

```sql
Expand Down
12 changes: 6 additions & 6 deletions solution/0100-0199/0197.Rising Temperature/README_EN.md
Original file line number Diff line number Diff line change
Expand Up @@ -59,13 +59,13 @@ In 2015-01-04, the temperature was higher than the previous day (20 -&gt; 30).
### **SQL**

```sql
SELECT w1.Id
# Write your MySQL query statement below
SELECT w1.id
FROM
Weather AS w1,
Weather AS w2
WHERE
DATEDIFF(w1.RecordDate, w2.RecordDate) = 1
AND w1.Temperature > w2.Temperature;
Weather AS w1
JOIN Weather AS w2
ON datediff(w1.recordDate, w2.recordDate) = 1
AND w1.temperature > w2.temperature;
```

```sql
Expand Down
12 changes: 6 additions & 6 deletions solution/0100-0199/0197.Rising Temperature/Solution.sql
Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
SELECT w1.Id
# Write your MySQL query statement below
SELECT w1.id
FROM
Weather AS w1,
Weather AS w2
WHERE
DATEDIFF(w1.RecordDate, w2.RecordDate) = 1
AND w1.Temperature > w2.Temperature;
Weather AS w1
JOIN Weather AS w2
ON datediff(w1.recordDate, w2.recordDate) = 1
AND w1.temperature > w2.temperature;