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 table_name_32 ( drg_number_s_ VARCHAR, railway_number_s_ VARCHAR )

### Question ###
Which DRG number has xxx railway number?

### Accurate SQL ###

SELECT drg_number_s_ FROM table_name_32 WHERE railway_number_s_ = "xxx"