Question

Using the following SQL expression but I’m getting an error.

select
  CampaignCustomer.CampaignCustomerID,
  convert(varchar, CampaignCustomer.ModifiedDate, 111) as startdate,
  CampaignCustomer.CampaignID,
  CampaignCustomer.CampaignCallStatusID,
  CampaignCustomer.UserID,
  CampaignCustomerSale.Value,
  Users.Name
from CampaignCustomer
  inner join CampaignCustomerSale
    on CampaignCustomer.CampaignCustomerID = CampaignCustomerSale.CampaignCustomerID
  inner join Users
    on CampaignCustomer.UserID = Users.UserID
where
  CampaignCustomer.CampaignCallStatusID = 21
  and CampaignCustomer.startdate = '2011/11/22'      <------- THIS
order by
  startdate desc,
  Users.Name asc

Error:

Msg 207, Level 16, State 1, Line 1
Invalid column name ‘startdate’.

I can’t recognize my alias name startdate in the WHERE clause, but it can in my ORDER BY clause. What’s wrong?

Edit:
And no, it is not possible for me to change the datatype to date instead of datetime. The time is needed elsewhere. But in this case, I need only to get all posts on a specific date and I really don’t care about what time of the date the modifieddate is 🙂

Maybe another method is needed instead of convert()?

Answer 1

You can’t use column alias in WHERE clause.

---

Change it to:

where
  CampaignCustomer.CampaignCallStatusID = 21
  and convert(varchar, CampaignCustomer.ModifiedDate, 111) = '2011/11/22'