Link to home
Start Free TrialLog in
Avatar of sbornstein2
sbornstein2

asked on

SQL Query Syntax Difference

Hello all,

I have the following.   I have a table called Customer that has the following data for example:

Customer
CustId        CustDate       CustOrdAmount      CustGrpAmount
1                 9/2/2014      1000.00                  900.00
1                 10/1/2014      800.00                  800.00
1                 11/2/2014      900.00                  100.00
2                  8/4/2014       990.00                  990.00
2                  9/5/2014       700.00                  800.00
I then have another temp table I will create that will have the following:

#TempCustomer
CustId         CustDate      CustOrdAmount      CustGrpAmount
1                 11/29/2014     800.00                     500.00
2                 10/30/2014     700.00                     800.00

What I need to do is check based on the CustId if the temp table CustOrdAmount delta is different OR the CustGrpAmount is different than the Max(CustDate) record in Customer for that CustId then Insert a new record into the Customer Table otherwise ignore the insert from the Temp table to the Customer table for that CustId.

So in this case above I would be comparing the 3rd record in Customer table CustId = 1 to the TempTable CustId = 1 and inserting a record into the Customer table.  For CustId = 2 I would be ignoring that insert they are the same both columns.
Avatar of Vitor Montalvão
Vitor Montalvão
Flag of Switzerland image

This should returns the records that you need insert:
WITH Cust_CTE (CustId, CustDate) 
AS (
     SELECT CustId, MAX(CustDate)
     FROM Customer
)
SELECT c.CustId, c.CustDate
FROM Cust_CTE c
INNER JOIN #TempCustomer tc ON tc.CustId=c.CustId
WHERE tc.CustOrdAmount <> c.CustOrdAmount OR tc.CustGrpAmount=c.CustGrpAmount

Open in new window

Delta? What delta?
If you're using sql server 2008 or later, you can use merge.
merge customer as c
using #tempCustomer as t
on c.custid = t.custid and c.custordamount = t.custordamount and c.custgrpamount = t.custgrpamount
when not matched then
insert values (t.custid, t.custdate, t.custordamount, t.custgrpamount);
Avatar of sbornstein2
sbornstein2

ASKER

I need to look at every record in the #TempCustomer then compare it against the max(custdate) record in Customer where CustId = the same CustID.   So the records I would be comparing for the 1st temp table record is:

#TempCustomer
 CustId         CustDate      CustOrdAmount      CustGrpAmount
 1                 11/29/2014     800.00                     500.00

Then getting the Max cust date record in Customer for that same CustId
Customer
 CustId        CustDate       CustOrdAmount      CustGrpAmount
 1                 11/2/2014      900.00                  100.00

Then if CustOrdAmount is different OR CustGrpAmount is different I want to insert the #TempCustomer table record into the Customer table.   In this case they are different so my Customer table would now look like this:

Customer
 CustId        CustDate       CustOrdAmount      CustGrpAmount
 1                 9/2/2014      1000.00                  900.00
 1                 10/1/2014      800.00                  800.00
 1                 11/2/2014      900.00                  100.00
 1                 11/29/2014    800.00                  500.00
 2                  8/4/2014       990.00                  990.00
 2                  9/5/2014       700.00                  800.00

Then for the 2nd record in the temp table I would be comparing:
#TempCustomer
 CustId         CustDate      CustOrdAmount      CustGrpAmount
 2                 10/30/2014     700.00                     800.00

Customer
 CustId        CustDate       CustOrdAmount      CustGrpAmount
 2                  9/5/2014       700.00                  800.00

In this case they are the same so I would not insert anything into Customer.

Then last scenario if the Temp table record did not have a matching CustId record at all in the Customer table I would insert that into the Customer table.
ASKER CERTIFIED SOLUTION
Avatar of Koen Van Wielink
Koen Van Wielink
Flag of Netherlands image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Did you test my script?
awesome thanks I ended up using the NOT EXISTS as well