转换 SQL 查询以在 MS Access SQL 中工作

Question

我正在尝试将 SQL 查询转换为在 MS-Access 中工作，有什么建议的方法吗？谢谢

SELECT        
  colldet.college,    
  COUNT(DISTINCT manuscript.p_name) AS A,
  COUNT(DISTINCT CASE WHEN s_p = 'منجز' THEN p_name END) AS B,
  COUNT(DISTINCT CASE WHEN s_p = 'منجز منشور' THEN p_name END) AS C, 
  COUNT(DISTINCT CASE WHEN s_p = 'مخطط' THEN p_name END) AS D
FROM manuscript 
RIGHT OUTER JOIN colldet 
ON manuscript.coll_name = colldet.college
GROUP BY colldet.college

Answer 1

正如 June7 所指出的，Access 不支持 COUNT DISTINCT，因此您需要在计数之前先区分事物。同样，正如 June7 所建议的那样，使用 Iif() 而不是 CASE。这是一个猜测：

SELECT Q.College,
COUNT(Q.A1) AS A,
COUNT(Q.B1) AS B,
COUNT(Q.C1) AS C,
COUNT(Q.D1) AS D
FROM (SELECT DISTINCT colldet.college,
    manuscript.p_name AS A1,
    IIF(s_p = 'منجز',p_name,Null) AS B1,
    IIF(s_p = 'منجز منشور',p_name,Null) AS C1,
    IIF(s_p = 'مخطط',p_name,Null) AS D1
    FROM manuscript
    RIGHT OUTER JOIN colldet
    ON  manuscript.coll_name = colldet.college)
AS Q
GROUP BY Q.college

转换 SQL 查询以在 MS Access SQL 中工作

Convert SQL query to work in MS Access SQL

sql

ms-access