MERGE AGAIN????? PLZ Somebody HELP ME!!!!!

Question

Hello everyone! I am so angry because of the merge statement!!!!! No one can't tell me what I have to do????
Guys!!!! I am trying to de a trigger on a TableA that fire when I try to insert data, the trigger the only thing have to do is insert the same data inserted on TableA to the TableB (not all fields), if the the row I want to insert on TableB exist I just update it and increment by 1 a field that represent the amount of rwos I pretended to insert to the TableB with the same unique index of the TableB. I had to say before TableA has a unique index, it is compose for few fields, and the primary key of both tables is an autoincremented field. Here I put an example what I want to do:
Example:
This is the data I want to insert on TableA, after insert on TableA
a trigger will fire, it will merge the data I want to Insert on
TablaA with The TableB. If I Merge TableA with TableB will show an
error of duplicated unique index, also an error of mutation. I want
to do the Merge on TableB Using Each Rows I am inserting trated as
a table or as a query (the merge sintax says that), but I don't
know how to do that????
Primary Key for TableA: IDROW
Primary Key for TableB: IDROW
Unique Index TableB: IDMOvil Service Date
The trigger will result this:
TableA
IDRow IDMOvil Service Date Speed Operation
1 234 A 8/2/2007 15.5 T
2 234 A 8/2/2007 13.5 T
3 234 A 8/2/2007 10.5 T
4 235 A 8/2/2007 15.3 T
TableB
IDRow IDMOvil Service Date RowsWithSameUniqueIndex
1 234 A 8/2/2007 3
2 235 A 8/2/2007 1

Answer 1

The TableA has an autonumeric as PK.
The TableB has an autonumeric as PK.
The TableB has a Unique Index compuse by some fields of the table except by his PK.
Remember I do the insert of this way (Multiple insert):
------------------ 1st Insert---------------------
Insert into TableA (Field1, field2, field3, field4)
Select 'Value1','value2','Value3','Value4'
Union All Select 'Value1','value2','Value3','Value5'
Union All Select 'Value1','value2','Value3','Value6'
Union All Select 'Value6','value2','Value3','Value7'
I don't know how to fill the example you sent me???? Because I am not doing the Merge with the TableA and tableB.
I don't think no one have done this before????
I want to do the Merge with each row I want to insert on the TableA, I don't know what to do that??? I don't know how to obtein the actual row to insert and declare it as a table or a query (example: Select :New.Field1, :New.Field2, :New.Field3, :New.Field4 from Dual) and do the merge with this select and my TableB, but it doesn't work?????
Forgive me if you can not understand me, ok.
Thanks for everything,