Question

I have two tables as below:

tbl_test

OFID bigint
Offer_Text text

OFID    Offer_Text   
-------    ----------    
1014    Test1   
1015    Test2

tbl_trans

OfferNo nvarchar        

OfferNo       
---------    
1015    
1015   
1015   
1014

Now, I want an o/p as below

OFID    Offer_Text  Counter    
-------    -------------  -------  
1014    Test1       1   
1015    Test2       3

That means count of each OFID with the Offer_Text also..

Is it possible..?

What will be the correct query for this?

My Existing query is this:

SELECT 
   offer_Text, OFID, COUNT(OFID) as Counter 
FROM 
    tbl_Test as a, tbl_trans as b 
WHERE 
    cast(a.OFID as nvarchar) = b.OfferNo 
GROUP BY 
    a.OFID

But giving me the following error:

Column ‘tbl_Offer.Offer_Text’ is invalid in the select list because it
is not contained in either an aggregate function or the GROUP BY
clause.

Answer 1

Sure:

SELECT 
   OFID, Offer_Text,
   Counter = (SELECT COUNT(*) 
              FROM dbo.tbl_trans t
              WHERE t.OfferNo = CAST(OFID AS NVARCHAR(30)))
FROM
   dbo.tbl_test 

Gives you your desired output of:

OFID  OfferText  Counter
1014  Test1        1
1015  Test2        3

Update: to have only those rows that exist in the tbl_trans subtable (a new requirement – not present in the original question!), you need something like this:

SELECT 
   OFID, Offer_Text,
   Counter = (SELECT COUNT(*) 
              FROM dbo.tbl_trans t
              WHERE t.OfferNo = CAST(OFID AS NVARCHAR(30)))
FROM
   dbo.tbl_test 
WHERE 
   EXISTS (SELECT * FROM dbo.tbl_trans WHERE t.OfferNo = OFID)