Updating table through view in oracle whos dating orlando bloom
To refer to the remote database in a subquery, append the database link name to the table names in the FROM clause of the subquery.An example of this is shown in the following listing: NOTE If you do not append the database link name to the table names in the FROM clause of UPDATE subqueries, tables in the local database will be used.CREATE TRIGGER TRGI_VW_PAYMENT ON VW_LAST_PAYMENT_DETAILS INSTEAD OF INSERT AS BEGIN INSERT INTO STUDENT_PAYMENT SELECT STD_ID, PAY_AMT, PAY_DATE FROM INSERTED END This Code working fine.But Instead of static field i want dynamic field here, like i want to retrieve column name from information_schema.columns. select * from student; ID NAME SCORE ---------- --------------- ---------- 1 Jack 540 2 Rose 3 William 650 4 Caledon 620 5 Fabrizio 600 6 Thomas 7 Ruth 690 11 Brock 705 10 Lizzy 9 Wallace 600 8 Spicer 620 11 rows selected. Thanks, Hi egavaldo, MERGE doesn’t support the RETURNING clause and going by this Ask Tom thread, the feature isn’t likely to be available anytime soon.SQL In the MERGE statement above, Jack, Caledon and Fabrizio’s records were not deleted from the table STUDENTS though their scores are below 640, since the delete condition works on the source, not the target. Interestingly, I have found it hard to get managers to agree to using it – they don’t like the sequence gaps and the fact that inserts and update counts aren’t reported individually. Hi, How do you know to know the id of the row that has been inserted OR updated? A workaround is to add a couple of tracking columns to the target table: transaction_type, transaction_date.Oracle’s MERGE statement is tailor-made for situations when you want to do an "upsert" i.e.update existing rows in a table or insert new rows depending on a match condition.
A view is actually a composition of a table in the form of a predefined SQL query.
This is true even if the table being updated is in a remote database.
In this example, the remote BOOKSHELF table is updated based on the RATING value on the remote BOOKSHELF table.
PUT_LINE('Record successfully inserted into emp_backup table'); END; Second Problem: We want o update a record in the ’emp_backup’ table if a corresponding record is updated in the ’emp’ table.
As we’ve already created both the tables in above example, we will directly write a trigger for ‘AFTER UPDATE’.