Show customer ids who don't have an account.
CREATE TABLE Customers (customer_id VARCHAR); CREATE TABLE Accounts (customer_id VARCHAR)
SELECT customer_id FROM Customers EXCEPT SELECT customer_id FROM Accounts
### Context: CREATE TABLE Customers (customer_id VARCHAR); CREATE TABLE Accounts (customer_id VARCHAR) ### Question: Show customer ids who don't have an account. ### Answer: SELECT customer_id FROM Customers EXCEPT SELECT customer_id FROM Accounts