Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE order_items ( order_item_id VARCHAR, product_id VARCHAR )

### Question ###
Find the ids of all the order items whose product id is 11.

### Accurate SQL ###

SELECT order_item_id FROM order_items WHERE product_id = 11