What average week has shea stadium as the game site, and 1979-12-09 as the date?
CREATE TABLE table_name_11 (week INTEGER, game_site VARCHAR, date VARCHAR)
SELECT AVG(week) FROM table_name_11 WHERE game_site = "shea stadium" AND date = "1979-12-09"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_11 (week INTEGER, game_site VARCHAR, date VARCHAR) Question: What average week has shea stadium as the game site, and 1979-12-09 as the date? [/INST] SELECT AVG(week) FROM table_name_11 WHERE game_site = "shea stadium" AND date = "1979-12-09" </s>