任何人都可以帮我将Access Query转换为MS SQL Query

Question

您好我有一个访问查询，任何人都可以帮我请我将查询转换为MS SQL 2008查询。

挣扎于Transform和PIVOT。

访问查询是：

TRANSFORM Count(vwg_vkCustomers.CustomerNo) AS CountOfCustomerNo
SELECT vwg_vkCustomers.ClassID, vwg_vkCustomers.SubjectTypeID, vwg_vkCustomers.TutorCode
FROM vwg_vkCustomers
WHERE (((vwg_vkCustomers.TutorCode)="123456") AND ((vwg_vkCustomers.CustomerAdded)>#6/21/2011#))
GROUP BY vwg_vkCustomers.ClassID, vwg_vkCustomers.SubjectTypeID, vwg_vkCustomers.TutorCode
PIVOT vwg_vkCustomers.Type;

谢谢

Answer 1

我不知道IIF的T-SQL版本，但这是不使用TRANSFORM / PIVOT的交叉表查询的Access版本。对每个所需的列重复IIF表达式：

SELECT vwg_vkCustomers.ClassID, vwg_vkCustomers.SubjectTypeID, vwg_vkCustomers.TutorCode,
Sum(IIF(vwg_vkCustomers.Type="Whatever",1,0) AS TypeWhatever 
FROM vwg_vkCustomers
WHERE (((vwg_vkCustomers.TutorCode)="123456") AND ((vwg_vkCustomers.CustomerAdded)>#6/21/2011#))
GROUP BY vwg_vkCustomers.ClassID, vwg_vkCustomers.SubjectTypeID, vwg_vkCustomers.TutorCode

Answer 2

将此与TimD的答案结合起来，因为我不经常与TRANSFORM争吵....

对于Iif，请使用CASE：

...
CASE vwg_vkCustomers.Type
WHEN 'Whatever' 1
ELSE 0
END,
...

请注意，您使用单引号而不是双引号。