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GeekInterview.com > Interview Questions > Oracle > SQL Plus
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Question: What is difference between TRUNCATE & DELETE
Answer:
Answer posted by Scott on 2005-05-25 18:30:04: TRUNCATE is a DDL command and cannot be rolled back. All of the memory space is released back to the server.
DELETE is a DML command and can be rolled back.
Both commands accomplish identical tasks (removing all data from a table), but TRUNCATE is much faster. |
| September 09, 2005 10:00:24 |
#5 |
| Luisa G. Reina |
Member Since: Visitor Total Comments: N/A |
RE: What is difference between TRUNCATE & DELETE
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Truncate: Drop all object's statistics and marks like High Water Mark, free extents and leave the object really empty with the first extent.
Delete: You can keep object's statistics and all allocated space. |
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