When did the Sunrisers Hyderabad win their first match?
Sunrisers Hyderabad refers to Team_Name = 'Sunrisers Hyderabad'; win their first match refers to Match_Winner and min(Match_Date)
SELECT T1.Match_Date FROM `Match` AS T1 INNER JOIN Team AS T2 ON T1.Match_Winner = T2.Team_Id WHERE T2.Team_Name = 'Sunrisers Hyderabad'