ทีม VÃ©lez SÃ¡rsfield เล่นไปกี่เกมในช่วงปี 1989-90?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
How many games were played by the Vélez Sársfield team from 1989-90?It is not neccessary to use all the tables.
 table_17968274_2:  (team [ VARCHAR) ]
SELECT 1989 AS _90 FROM table_17968274_2 WHERE team = "Vélez Sársfield"