Query to count no.of orders using joins and subqueries

Question

I have 3 tables i want to show the no. of orders when order placed date is equal to Create date(user registered date)
order table contains following columns
[OrderId]
      ,[UserId]
      ,[OrderPlaced]
      ,[Paid]
      ,[DatePaid]
      ,[PaymentMethod]
      ,[PaymentRef]
      ,[BillTo]
      ,[AddressLine1]
      ,[AddressLine2]
      ,[City]
      ,[County]
      ,[CountryId]
      ,[PostCode]
      ,[Shipped]
      ,[DateShipped]
      ,[Packing]
      ,[ShipTo]
      ,[ShippingAddressLine1]
      ,[ShippingAddressLine2]
      ,[ShippingCity]
      ,[ShippingCounty]
      ,[ShippingCountryId]
      ,[ShippingPostCode]
      ,[ShippingCost]
      ,[ShippingOptionId]
      ,[AllocatedPoint]
      ,[PointValue]
      ,[PromoCode]
      ,[DiscountValue]
      ,[InvoiceNumber]
      ,[IPAddress]
      ,[StatusCode]
      ,[IssueCode]
      ,[USStateId]
      ,[ShippingUSStateId]
      ,[CurrencyCode]
      ,[ExchangeRate]
      ,[LastActivityDate]
      ,[AwardedPoint]
      ,[Archived]
      ,[LastAlertDate]
aspnet_Membership table contains
[Password]
      ,[PasswordFormat]
      ,[PasswordSalt]
      ,[MobilePIN]
      ,[Email]
      ,[LoweredEmail]
      ,[PasswordQuestion]
      ,[PasswordAnswer]
      ,[IsApproved]
      ,[IsLockedOut]
      ,[CreateDate]
      ,[LastLoginDate]
      ,[LastPasswordChangedDate]
      ,[LastLockoutDate]
      ,[FailedPasswordAttemptCount]
      ,[FailedPasswordAttemptWindowStart]
      ,[FailedPasswordAnswerAttemptCount]
      ,[FailedPasswordAnswerAttemptWindowStart]
      ,[Comment]
Account table contains 
[UserId]
      ,[FirstName]
      ,[LastName]
      ,[Email]
      ,[ContactNumber]
      ,[DOB]
      ,[Note]
my code is
SELECT a.UserId, m.Email, o.OrderPlaced, o.OrderId, m.CreateDate
FROM Account a, aspnet_Membership m, Orders o
where a.UserId=o.UserId and a.Email=m.Email ORDER BY a.UserId 
I had displayed the required details using joins but now i want the number of orders when order placed date is equal to Create date(user registered date)
can anyone help me iam a fresher
Thanks in advance.

Answer 1

You cant use subquery in ORDER BY like this.
you need to do it like this
SELECT a.UserId, m.Email, o.OrderPlaced, o.OrderId, m.CreateDate
FROM Account a
INNER JOIN aspnet_Membership m
ON a.Email=m.Email
INNER JOIN (SELECT *,COUNT(OrderId) OVER (PARTITION BY Createddate) AS Cnt FROM Orders) o
on a.UserId=o.UserId
ORDER BY a.UserId,o.Cnt
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