What functions were released on 2011-06-23? 
CREATE TABLE table_18138132_2 (function VARCHAR, release_date VARCHAR)
SELECT function FROM table_18138132_2 WHERE release_date = "2011-06-23"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_18138132_2 (function VARCHAR, release_date VARCHAR) Question: What functions were released on 2011-06-23?  [/INST] SELECT function FROM table_18138132_2 WHERE release_date = "2011-06-23" </s>