Write a SQL query to get all orders placed in April 2023 (order_date starts with '2023-04').
| id | amount | order_date | status | |----|--------|------------|--------| | 10 | 800.0 | 2023-04-01 | Delivered | | 11 | 27500.0 | 2023-04-10 | Delivered | | ... | ... | ... | ... |