Oledb SQL问题 [英] Oledb SQL Problem

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本文介绍了Oledb SQL问题的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我使用oledb连接时使用以下SQL查询:



 
SELECT
Sessions.SessionID,
Sessions.SessionType,
Sessions.SessionDate ,
Count (Bookings.Status) AS BookedPlaces
FROM 会话
LEFT JOIN 预订 ON Sessions.SessionID = Bookings.SessionID
GROUP BY
Sessions.SessionID,
Sessions.SessionType,
Sessions.SessionDate

解决方案

嗨!使用GROUP BY时,必须使用HAVING而不是WHERE。因此,您希望在GROUP BY之后的SQL语句末尾添加


HOOKING Bookings.Status ='Active'


。 br />
http://www.w3schools.com/SQL/sql_having.asp


祝你好运! :)


I have the following SQL query that I am using with an oledb connection:

SELECT
Sessions.SessionID,
Sessions.SessionType,
Sessions.SessionDate,
Count(Bookings.Status) AS BookedPlaces
FROM Sessions
LEFT JOIN Bookings ON Sessions.SessionID = Bookings.SessionID
GROUP BY
Sessions.SessionID,
Sessions.SessionType,
Sessions.SessionDate

解决方案

Hi! When you use GROUP BY, you have to use HAVING instead of WHERE. So you would want to put

HAVING Bookings.Status = 'Active'

at the end of your SQL statement, after the GROUP BY.
http://www.w3schools.com/SQL/sql_having.asp

Good luck! :)


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