Inner Join vs Left Join | Dataford Interview Questions

Can you describe the difference between an inner join and a left join in SQL?

Use the provided customers and orders tables to demonstrate both results with one query.

Output

Columns: join_type, customer_id, customer_name, and order_id
Include the results produced by each join type, ordered by join_type, customer_id, and order_id.

customers

orders

Column	Type	Description
order_idPK	INT	Unique order identifier
customer_id	INT	Customer associated with the order
order_status	VARCHAR(30)	Current order status

Your question is Inner Join vs Left Join. Start with the requirements and the two tables in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Can you describe the difference between an inner join and a left join in SQL?

Use the provided customers and orders tables to demonstrate both results with one query.

Columns: join_type, customer_id, customer_name, and order_id
Include the results produced by each join type, ordered by join_type, customer_id, and order_id.

customers

orders

Column	Type	Description
order_idPK	INT	Unique order identifier
customer_id	INT	Customer associated with the order
order_status	VARCHAR(30)	Current order status

Your question is Inner Join vs Left Join. Start with the requirements and the two tables in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.