SourCaPlacement OS

Targeted Campus Assessment Prep

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SourCaPlacement OS

Targeted Campus Assessment Prep

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SourCa/ Technical Preparation Platform

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SourCa is an independent coding and assessment practice system designed from publicly available interview patterns. Not affiliated with or endorsed by any company.

INDEPENDENT PLATFORM

Practice Directory•

Customers Who Never Ordersql

Relational Database Schema

Customers Who Never Order

Write an SQL query to report all customers who never order anything. ### Schema: `Customers` | Column Name | Type | | :--- | :--- | | id | int | | name | varchar | ### Schema: `Orders` | Column Name | Type | | :--- | :--- | | id | int | | customerId | int |

Tables & Sample Fixtures

Table: Customers

id (int)	name (varchar)
1	Joe
2	Henry
3	Sam
4	Max

Table: Orders

id (int)	customerId (int)
1	3
2	1

query.sql

Execution Output Result

Click 'Run & Verify Query' to test your SQL against the sample test fixture.

SourCaPlacement OS

Targeted Campus Assessment Prep

Setting up coding workspace...

Loading problem statement, test cases, and compiler sandbox

Practice Directory•

Customers Who Never Ordersql

Relational Database Schema

Customers Who Never Order

Tables & Sample Fixtures

Table: Customers

id (int)	name (varchar)
1	Joe
2	Henry
3	Sam
4	Max

Table: Orders

id (int)	customerId (int)
1	3
2	1

query.sql

Execution Output Result

Click 'Run & Verify Query' to test your SQL against the sample test fixture.