the magic tables are deleted and inserted.
while we are inserting or deleting a rows into a object the
magic tables were created and after the commit transaction
the tables are removed.so it is called magic tables
MAGIC TABLES NOTHING BUT INSERTED AND DELETED WHICH ARE
TEMPORARY OBJECTS CREATED BY SERVER INTERNALLY TO HOLD
RECENTLY INSERTED VALUES IN THE CASE OF INSERT,TO HOLD
RECENTLY DELETED VALUES IN THE CASE OF DELETE,TO HOLD
BEFORE UPDATING VALUES OR AFTER UPDATING VALUES IN THE CASE
OF UPDATE.
suppose if we write a trigger on the table on insert or
delete or update
on insertion of record into that table,
inserted table will create automatically by database,
on deletion of record from that table,
deleted table will create automatically by database,
This two tables inserted and deleted are called magic
tables.
Magic Tables:
Whenever a trigger fires in response to the
INSERT,DELETE,or UPDATE statement,two special tables are
created.These are the insert and the delete tables.They are
also referred to as the magic tables.These are the
conceptual tables and are similar in structure to the table
on which trigger is defined(the trigger table).
The inserted table contains a copy of all records that are
inserted in the trigger table.
The deleted table contains all records that have been
deleted from deleted from the trigger table.Whenever any
updation takes place,the trigger uses both the inserted and
deleted tables
The magic table is when we "INSERT" a table values that
values stored into table it's one magic
and another magic is "DELETE" when we DELETE the values in
a table the compiler delete the values whatever you are
stored
@)INSERT
@)DELETE
Magic tables are created when data is inserted or updated
in the normal tables. They get deleted when the commit is
done. They are used for the auditing purposes.
They are useful in keeping track of the insertion and
updation on the database.
There are 2 Magic Tables in SQL server Inserted and Deleted.
These are mantained by SQL server for Internal processing
whenever an update, insert of delete occur on a table.
However, we can refere these tables in a Trigger.
Whenever an update table statement is fired SQL server
mantains the original row before updation in a deleted
table and New (updated )row in a Inserted Table.
Same is the case when an insert is fired Only Inserted
table is populated with inserted Row.
and when Delete table statement is fired Deleted table is
populated with the deleted row.
I need a query that retrieves info from an Oracle table and
a query that retrieves info from a SQL Server table. The
info has to be joined together according to Record ID
numbers. I have very limited access to the Oracle database
but full control of the SQL Server database.How do I join
two different queries from two different databases?