What is the largest number of episodes for a 1989 season dvd release? 
CREATE TABLE table_17697980_1 (no_of_episodes INTEGER, year VARCHAR)
SELECT MAX(no_of_episodes) FROM table_17697980_1 WHERE year = "1989"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_17697980_1 (no_of_episodes INTEGER, year VARCHAR) Question: What is the largest number of episodes for a 1989 season dvd release?  [/INST] SELECT MAX(no_of_episodes) FROM table_17697980_1 WHERE year = "1989" </s>