What is the earliest Date on a Surface of clay in a Championship in Linz, Austria?
CREATE TABLE table_name_15 (date INTEGER, surface VARCHAR, championship VARCHAR)
SELECT MIN(date) FROM table_name_15 WHERE surface = "clay" AND championship = "linz, austria"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_15 (date INTEGER, surface VARCHAR, championship VARCHAR) Question: What is the earliest Date on a Surface of clay in a Championship in Linz, Austria? [/INST] SELECT MIN(date) FROM table_name_15 WHERE surface = "clay" AND championship = "linz, austria" </s>