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max date problem

Author

Topic

akpaga
Constraint Violating Yak Guru

331 Posts

Posted - 2008-04-07 : 19:34:12

i have a table temp t that is used as a back up of live table .

the table has following fileds( customer,customercardnumber,transactiondate)

i need to insert these fields into another table t1 in such a way that
no duplicate records are inserted .ie after once a table t1 is populated the next time insert statement should insert only the new records that were added to the temp table t but not all records.

i think using max (transactiondate) of both tables can be considered for this . but don know put in code

thanks .please suggest with the code.

sodeep
Master Smack Fu Yak Hacker

7174 Posts

Posted - 2008-04-07 : 20:09:33

Do you have to insert one-time or regularly?

akpaga
Constraint Violating Yak Guru

331 Posts

Posted - 2008-04-07 : 21:42:44

regularly whenever new transaction is done by new customer o r the same customer.

thanks

sodeep
Master Smack Fu Yak Hacker

7174 Posts

Posted - 2008-04-07 : 22:07:07

1)create t1 table with same structure and with constraints added.

2)-- Export distinct data
insert into t1( customer,customercardnumber,transactiondate)
select distinct customer,customercardnumber,transactiondate
from #t

3) Create Trigger as:
Create trigger [TR] on #t
after insert
as
begin
insert into t1(customer,customercardnumber,transactiondate)
select distinct customer,customercardnumber,transactiondate
from inserted
end

akpaga
Constraint Violating Yak Guru

331 Posts

Posted - 2008-04-07 : 23:12:21

thanks

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