Table: Products

+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| product_id  | int     |
| low_fats    | enum    |
| recyclable  | enum    |
+-------------+---------+

product_id is the primary key for this table.
low_fats is an ENUM of type ('Y', 'N') where 'Y' means this product is low fat and 'N' means it is not.
recyclable is an ENUM of types ('Y', 'N') where 'Y' means this product is recyclable and 'N' means it is not.

Write an SQL query to find the ids of products that are both low fat and recyclable.

Return the result table in any order.

Solution

注意判断相等的时候是 \(=\)

# Write your MySQL query statement below
SELECT
    product_id
FROM 
    Products
WHERE
    low_fats ='Y' AND recyclable = 'Y'
;