Question

SELECT id, 
       sageaccount, 
       sageid, 
       totalwithoutvat, 
       vat, 
       total, 
       invoicedate, 
       alloweditting, 
       finished, 
       CASE WHEN isposted = 1 THEN 'Posted on ' + posteddate 
           ELSE 'Not Posted' 
       END AS Posted 
FROM Invoices 
WHERE (sageaccount = @sageaccount)

If I take the ‘+ posteddate’ away, it works perfectly. But with the + posteddate, I get this error:

Conversion failed when converting datetime from character string.

The posteddate field is usually null, unless posted is true, and the format of posteddate is definetly datetime.

Any ideas?

Answer 1

You need to convert posteddate to a varchar value in order to concatenate it with another varchar value (‘Posted on ‘)

SELECT  id, 
        sageaccount, 
        sageid, 
        totalwithoutvat, 
        vat, total, 
        invoicedate, 
        alloweditting, 
        finished, 
        CASE WHEN isposted = 1 THEN 'Posted on ' + CONVERT(varchar(10), posteddate, 20) ELSE 'Not Posted' END AS Posted 
FROM Invoices 
WHERE (sageaccount = @sageaccount)