我有一个功能,包括SQL与MS Access我一直在努力弄清楚,但不能..我只是得到一个错误信息..我的代码是为了一个视图..
这是代码:
(SELECT Rum, COUNT(DISTINCT(Larare)) AS antal FROM Kurstillfalle
GROUP BY Rum)
Access不支持COUNT(DISTINCT columnname),但您可以这样做:
SELECT
t.Rum,
COUNT(t.Larare)) AS antal
FROM (SELECT DISTINCT Rum, Larare FROM Kurstillfalle) AS t
GROUP BY t.Rum