Question

I have a table1 with columns (date, field1, field2, field3, field4, field5, field6, field7, field8)

I have another table2 with columns (date, field1,someothercolumns, field3, field5, field7, unrelatedcolumns1, someothercolumns2)

Now every time when new data is imported into table2, I also want data from columns (date, field1, field3, field5, field7) from table2 to automatically be copied into table1 (date, field1, field3, field5, field7).

Missing columns in table1 can have null values

Is it possible using trigger or any stored procedures?

Answer 1

Try something like this:

CREATE TRIGGER YourTriggerName
ON dbo.Table2
AFTER INSERT 
AS BEGIN

   INSERT INTO dbo.Table1(date, field1, field3, field5, field7)
     SELECT
         date, field1, field3, field5, field7
     FROM
         Inserted
END

In a trigger, you can access the “pseudo” tables Inserted (and Deleted for UPDATE and DELETE triggers) which contains all rows that have been affected by the statement that caused the trigger to fire.

This is important : if you have an INSERT statement that inserts 10 rows, your trigger will fire once and the pseudo table Inserted will have 10 rows in it. Do not ever assume that your trigger fires once per row that’s being inserted – that is not the case.

So in this trigger here, whenever an INSERT into table2 has happened, the columns in question are extracted from the Inserted pseudo table and inserted into table1.

Does that solve your problem?