What is the date of appointment when the date of vacancy is 21 december 2007?
CREATE TABLE table_10592536_8 (date_of_appointment VARCHAR, date_of_vacancy VARCHAR)
SELECT date_of_appointment FROM table_10592536_8 WHERE date_of_vacancy = "21 December 2007"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_10592536_8 (date_of_appointment VARCHAR, date_of_vacancy VARCHAR) Question: What is the date of appointment when the date of vacancy is 21 december 2007? [/INST] SELECT date_of_appointment FROM table_10592536_8 WHERE date_of_vacancy = "21 December 2007" </s>