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_2 ( downstream_rate VARCHAR, version VARCHAR, standard_name VARCHAR )

### Question ###
What's the downstream rate for the Itu g.992.2 having a version of ADSL?

### Accurate SQL ###

SELECT downstream_rate FROM table_name_2 WHERE version = "adsl" AND standard_name = "itu g.992.2"