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tablespace_name, s.extent_management FROM user_tables t, user_tablespaces s WHERE t.tablespace_name = s.
Sounds pretty similar the problem outlined above, except that merge wants the new records to be in a staging table.All INSTEAD OF triggers are fired for each row and you cannot narrow down the event by column.Instead you can check to see what columns are updated in the body of the trigger by using the UPDATING ('column_name') clause.Lets create a compound trigger for auditing a large table called ’employees’. Similarly any such pre-processing if required can be performed on that source table (mutating table), doing so will avoid any possible mutating-error.Any changes made in any field of ’employees’ table needs to be logged in as a separate row in audit table ‘aud_empl’. For e.g., consider the same example with another restriction, “Any update of salary should be such that it is not less than 1/12th of maximum salary of any employee, or else an error is raised”.