How many players with a position are listed for the 2009 season? 
CREATE TABLE table_15463188_17 (position VARCHAR, season VARCHAR)
SELECT COUNT(position) FROM table_15463188_17 WHERE season = "2009"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_15463188_17 (position VARCHAR, season VARCHAR) Question: How many players with a position are listed for the 2009 season?  [/INST] SELECT COUNT(position) FROM table_15463188_17 WHERE season = "2009" </s>