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 TRANSACTIONS ( transaction_id VARCHAR, transaction_type_code VARCHAR )

### Question ###
Show all transaction ids with transaction code 'PUR'.

### Accurate SQL ###

SELECT transaction_id FROM TRANSACTIONS WHERE transaction_type_code = 'PUR'