# 1084. Sales Analysis III

<https://leetcode.com/problems/sales-analysis-iii>

## Description

Table: `Product`

```
+--------------+---------+
| Column Name  | Type    |
+--------------+---------+
| product\_id   | int     |
| product\_name | varchar |
| unit\_price   | int     |
+--------------+---------+
product\_id is the primary key of this table.
```

Table: `Sales`

```
+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| seller\_id   | int     |
| product\_id  | int     |
| buyer\_id    | int     |
| sale\_date   | date    |
| quantity    | int     |
| price       | int     |
+------ ------+---------+
This table has no primary key, it can have repeated rows.
product\_id is a foreign key to Product table.
```

Write an SQL query that reports the **products** that were **only** sold in spring 2019. That is, between **2019-01-01** and **2019-03-31** inclusive.

The query result format is in the following example:

```
Product table:
+------------+--------------+------------+
| product\_id | product\_name | unit\_price |
+------------+--------------+------------+
| 1          | S8           | 1000       |
| 2          | G4           | 800        |
| 3          | iPhone       | 1400       |
+------------+--------------+------------+
Sales table:
+-----------+------------+----------+------------+----------+-------+
| seller\_id | product\_id | buyer\_id | sale\_date  | quantity | price |
+-----------+------------+----------+------------+----------+-------+
| 1         | 1          | 1        | 2019-01-21 | 2        | 2000  |
| 1         | 2          | 2        | 2019-02-17 | 1        | 800   |
| 2         | 2          | 3        | 2019-06-02 | 1        | 800   |
| 3         | 3          | 4        | 2019-05-13 | 2        | 2800  |
+-----------+------------+----------+------------+----------+-------+
Result table:
+-------------+--------------+
| product\_id  | product\_name |
+-------------+--------------+
| 1           | S8           |
+-------------+--------------+
The product with id 1 was only sold in spring 2019 while the other two were sold after.
```

## ac

```java
```


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