SELECT COUNT(DISTINCT "date") FROM table_203_537 WHERE "competition" = 'euro 2000 qualifying'
how many euro 2000 qualifying competitions are listed ?
CREATE TABLE table_203_537 (
    id number,
    "#" number,
    "date" text,
    "venue" text,
    "opponent" text,
    "score" text,
    "result" text,
    "competition" text
)