I have the next query
insertinto tabla_A (value_1, value_2, value_3)select table_B.value_1, table_B.value_2, table_B.value_3from tabla_A rightjoin(table_C leftjoin table_D on table_C.value1 = table_D.value1)on table_A.value_1 = table_B.value_1where table_A isnull
As you can see, I have several tables involved in this query, and the thing is that table_B, table_C, table_D belong to an Oracle Database and Table_A is located in a SQL server.
What do you thing is the best way to face this query?, I mean by using the less quantity of merge join tasks, and using more the SQL statement.