Question

I’m from an access background with a little mySQL, so I’m slightly lost when it comes to SQL.

Here is the query I am using:

Select 
    tbl_AcerPFSSurveyIVR.NTlogin,
    tbl_AcerPFSSurveyIVR.Customer_Firstname,
    tbl_AcerPFSSurveyIVR.Customer_Lastname,
    tbl_AcerPFSSurveyIVR.CaseId,
    tbl_AcerPFSSurveyIVR.ContactNumber,
    CRM_TRN_ORDER.ORDER_PRICE,
    CRM_TRN_ORDER.ORDER_CREATEDDATE

This returns the proper record, but I want the very last… I know I should use something like this…

SELECT TOP 1 * 
FROM table_Name 
ORDER BY unique_column DESC

Where I get lost, and if I am correct in saying so, you can only do one Select… so how do I integrate the two? Thanks in advance for your help.

Answer 1

What you are wanting is something like:

SELECT TOP(1) 
  tbl_AcerPFSSurveyIVR.NTlogin,
  tbl_AcerPFSSurveyIVR.Customer_Firstname,
  tbl_AcerPFSSurveyIVR.Customer_Lastname,
  tbl_AcerPFSSurveyIVR.CaseId,
  tbl_AcerPFSSurveyIVR.ContactNumber,
  CRM_TRN_ORDER.ORDER_PRICE,
  CRM_TRN_ORDER.ORDER_CREATEDDATE
FROM
  tbl_AcerPFSSurveyIVR
JOIN CRM_TRN_ORDER
    ON tbl_AcerPFSSurveyIVR.CustomerId = CRM_TRN_ORDER.CUSTOMERID
ORDER BY
  CRM_TRN_ORDER.ORDER_CREATEDDATE DESC

Note: I made up the JOIN clause, because I don’t know your schema. You should pick real columns that satisfy the join, assuming there is a foreign key relationship of some kind. Otherwise, you would simply be taking a cartesian product which is most likely NOT what you want. However, you could do that by replacing the FROM … JOIN clauses above with “FROM tbl_AcerPFSSurveyIVR, CRM_TRN_ORDER”.