If the aircraft was  ussr mig-25 rb how many were destroyed?
CREATE TABLE table_1817852_1 (destroyed VARCHAR, aircraft VARCHAR)
SELECT destroyed FROM table_1817852_1 WHERE aircraft = "USSR MiG-25 RB"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_1817852_1 (destroyed VARCHAR, aircraft VARCHAR) Question: If the aircraft was  ussr mig-25 rb how many were destroyed? [/INST] SELECT destroyed FROM table_1817852_1 WHERE aircraft = "USSR MiG-25 RB" </s>