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_21479 ( "Downstream" text, "Upstream" text, "Bandwidth" text, "Price TL" text, "Every 1 GB" text, "MAX" text )

### Question ###
What is the bandwidth for downstream of 20 mbit/s for 69 tl?

### Accurate SQL ###

SELECT "Bandwidth" FROM table_21479 WHERE "Downstream" = '20 Mbit/s' AND "Price TL" = '69 TL'