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 customers ( customer_id VARCHAR, customer_name VARCHAR )

### Question ###
Find the IDs of customers whose name contains 'Diana'.

### Accurate SQL ###

SELECT customer_id FROM customers WHERE customer_name LIKE "%Diana%"