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_79649 ( "Class" text, "Wheel arrangement" text, "Fleet number(s)" text, "Manufacturer" text, "Serial numbers" text, "Year made" text, "Quantity made" text, "Quantity preserved" text )

### Question ###
what is the quantity made when the class is d-2?

### Accurate SQL ###

SELECT "Quantity made" FROM table_79649 WHERE "Class" = 'd-2'