Leetcode Problem 2084. Drop Type 1 Orders for Customers With Type 0 Orders

2084. Drop Type 1 Orders for Customers With Type 0 Orders

Leetcode Solutions

Using Subquery to Exclude Customers with Type Orders

Create a subquery to select distinct customer_id of customers who have at least one order of type 0.
In the main query, select all columns from the Orders table.
Use a WHERE clause to include orders of type 0.
Add a condition using OR to include orders of type 1 only if the customer_id is not in the list obtained from the subquery.
The final result will include all orders of type 0 and orders of type 1 from customers who do not have any type 0 orders.


erDiagram
    Orders {
        int order_id PK "Unique order identifier"
        int customer_id "Identifier of the customer"
        int order_type "Type of the order (0 or 1)"
    }

Using LEFT JOIN to Filter Orders

Ask Question

Programming Language

Purpose:

General Question

Debug My Code

image/screenshot of info(optional)

Full Screen

Leetcode Problem 2084. Drop Type 1 Orders for Customers With Type 0 Orders

Leetcode Solutions

Using Subquery to Exclude Customers with Type Orders

Solution Idea

Query Steps

Code Implementation

Using LEFT JOIN to Filter Orders

Ask Question

Suggested Answer