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wt is the difference between truncate and delete in which
situation u use delete and truncate in real time..
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Answer Posted / mukesh
TRUNCATE removes all rows from a table.The operation cannot
be rolled back and no triggers will be fired. As such,
TRUCATE is faster and doesn't use as much undo space as a
DELETE.
The DELETE command is used to remove rows from a table. A
WHERE clause can be used to only remove some rows. If no
WHERE condition is specified, all rows will be removed.
After performing a DELETE operation you need to COMMIT or
ROLLBACK the transaction to make the change permanent or to
undo it. Note that this operation will cause all DELETE
triggers on the table to fire.
TRUNCATE are DDL commands, whereas DELETE is a DML command.
As such, DELETE operations can be rolled back (undone),
while DROP and TRUNCATE operations cannot be rolled back.
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