"Order by" SQL problem (out of date / time range)

Question

I am having a problem with the query below:

SELECT 
    Consignments.LegacyID, 
    Consignments.TripDate,
    Consignments.CollectionName, 
    CASE 
        WHEN Sage2.InvoiceSummaryType = 'HT' THEN DeliveryTown 
        ELSE DeliveryName + ', ' + DeliveryTown + ', ' + DeliveryPostCode END AS 'DeliveryName', 
    Consignments.Pallets, 
    Consignments.Weight, 
    Consignments.BaseRate, 
    Consignments.FuelSurcharge, 
    Consignments.AdditionalCharges, 
    Consignments.BaseRate * Consignments.Quantity AS 'InvoiceValue', 
    Consignments.InvoiceNumber, 
    Consignments.Customer 
FROM 
    Consignments 

    INNER JOIN SageAccount 
        ON Consignments.Customer = SageAccount.LegacyID 
        AND SageAccount.Customer = 'true' 

    LEFT OUTER JOIN SageAccount AS Sage2 
        ON SageAccount.InvoiceAccount = Sage2.LegacyID 
WHERE 
    (Sage2.Customer = 'true') 
    AND (Consignments.Customer = @Customer) 
    AND (Consignments.InvoiceNumber IS NOT NULL) 
    OR (Sage2.Customer = 'true') 
    AND (Consignments.InvoiceNumber IS NOT NULL) 
    AND (Sage2.InvoiceAccount = @Customer)  

ORDER BY 
    CASE 
        WHEN Sage2.InvoiceSummaryType = 'HR' THEN TripDate  
        WHEN Sage2.InvoiceSummaryType = 'HS' THEN Consignments.LegacyID 
    END

For some reason, he keeps giving me the following error:

The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value order by

But only when he tries Order By TripDate, that is, when the “HR” case occurs. TripDate is a datetime field.

Any ideas?

Answer 1

, , , ( HS, ). , CASE, , select case when 1=0 then GETDATE() else 'foo' end , datetime

ORDER BY
         CASE
                  WHEN Sage2.InvoiceSummaryType = 'HR'
                  THEN TripDate
                  WHEN Sage2.InvoiceSummaryType = 'HS'
                  THEN Consignments.LegacyID
         END

, cast(TripDate as float) - (, ), .

ORDER BY
         CASE
                  WHEN Sage2.InvoiceSummaryType = 'HR'
                  THEN TripDate
                  ELSE NULL
         END,
         CASE
                  WHEN Sage2.InvoiceSummaryType = 'HS'
                  THEN Consignments.LegacyID
                  ELSE NULL
         END

.

Answer 2

"" THEN TripDate?

Answer 3

CASE . LegacyID a char?

, . CASE WHEN 'x' THEN ( int) "y" THEN ( ), SQL , .

Answer 4

, .

:

Convert(int, TripDate , 112) 

112 yyyymmdd, . 1 - [] .

, LegacyID . SQL_VARIANT