Question

我使用以下查询来查找来自医学部门的客户：

SELECT client.clientID, client.firstname, client.lastname, client.organization,
       client.department, client.email, events.Date, events.title,
       eventAttendance.eventID, eventAttendance.clientID,
       eventAttendance.attended
FROM client INNER JOIN 
     (events INNER JOIN eventAttendance ON events.id = eventAttendance.ID) 
     ON client.clientID = eventAttendance.clientID
WHERE client.organization like '%medicine'

在表中，可能性是“医学院”和“医学系”;但是，不会返回任何记录。我错过了什么？

谢谢。

Answer 1

Access中的通配符是*不是％

像这样改变你的sql：

like '*medicine'

Answer 2

我认为你可能并不总是有一个事件，所以你需要LEFT JOIN：

SELECT client.clientID, client.firstname, client.lastname, client.organization,
       client.department, client.email, events.Date, events.title,
       eventAttendance.eventID, eventAttendance.clientID,
       eventAttendance.attended
FROM client LEFT JOIN 
     (events LEFT JOIN eventAttendance ON events.id = eventAttendance.ID) 
     ON client.clientID = eventAttendance.clientID
WHERE client.organization like '*medicine'

MS Access 2007查询返回无结果

2 个答案: