Question

Table Structures:
tblCustomer

Customer_id  created   field1      field2        cardno
--------------------------------------------------------    
1014     Test1     Cell Phone  123146        1234567890
1015     Test2     Email       [e-mail]   2345678891

tbl_TransactionDishout

Trnx_id   offerNo   TerminalID      Created                  cardno
-------------------------------------------------------------------
1         1014      170924690436418 2010-05-25 12:51:59.547  1234567890

Is it possible to get the result as below date-wise records:

               Enrolled   Enrolled as Email  Enrolled as Text Deals Redeemed   
<First Date>   7          5                  2                6
<Next Date>    9          3                  6               14

My current query is something like this:

select created,
count(field1) Enrolled,
count(case field1 when 'E-mail' then 1 end) Enrolled_as_Email,
count(case field1 when 'Cell Phone' then 1 end) Enrolled_as_Cell
from tblCustomer c
group by created 
order by created desc

But It’s giving me the result of the date contained only in tblCustomer table..

Now, How to get Deals_redeemed..?
relation between tbl_transaction and tblCustomer is having same cardno…

Answer 1

In my understanding table tbl_TransactionDishout is an offer, and if it is followed through a record will be inserted into tblCustomers; if not, nothing will change. So deals redeemed is count of non-existing records in tblCustomers for given cardno:

select t.created,
   count(c.field1) Enrolled,
   count(case c.field1 when 'E-mail' then 1 end) Enrolled_as_Email,
   count(case c.field1 when 'Cell Phone' then 1 end) Enrolled_as_Cell,
   count(case when c.field1 is null then 1 end) [Deals Redeemed]
from tbl_TransactionDishout t left join tblCustomer c 
   on t.cardno = c.cardno
group by t.created
order by t.created desc

EDIT: c.created changed to t.created