What is difference between TRUNCATE & DELETE?
- 16 Answers
- 39778 Views
- Ahn Infotech, CitiGroup, ICICI, PreVator, Saama Tech, SkyTech, TCS, I also Faced
- E-Mail Answers
Answer Posted / mohit prabhu
TRUNCATE SQL Command:
TRUNCATE is faster and uses fewer system and transaction log resources than DELETE.
TRUNCATE removes the data by deallocating the data pages used to store the table’s data, and only the page deallocations are recorded in the transaction log.
TRUNCATE removes all rows from a table, but the table structure and its columns, constraints, indexes and so on remain. The counter used by an identity for new rows is reset to the seed for the column.
You cannot use TRUNCATE TABLE on a table referenced by a FOREIGN KEY constraint.
Because TRUNCATE TABLE is not logged, it cannot activate a trigger.
TRUNCATE can not be Rolled back.
TRUNCATE is DDL Command.
TRUNCATE Resets identity of the table.
DELETE SQL Command:
DELETE removes rows one at a time and records an entry in the transaction log for each deleted row.
If you want to retain the identity counter, use DELETE instead. If you want to remove table definition and its data, use the DROP TABLE statement.
DELETE Can be used with or without a WHERE clause
DELETE Activates Triggers.
DELETE can be Rolled back.
DELETE is DML Command.
DELETE does not reset identity of the table.
-----------------------------------------------------------
This is the most appropriate answer.
-----------------------------------------------------------
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
What does the argument [or replace] do?
How do you sort in sql?
what is bdb (berkeleydb)? : Sql dba
How to take user input in pl sql?
What are the different types of a subquery?
What is sql injection vulnerability?
Why having clause is used in sql?
What are different types of functions in sql?
what is the difference between mysql_fetch_array and mysql_fetch_object? : Sql dba
why does the selected column have to be in the group by clause or part of an aggregate function? : Sql dba
How do I count duplicates in sql?
what is the difference between group by and order by in sql? : Sql dba
Is primary key a clustered index?
What does the hierarchical profiler does?
Why do we create stored procedures & functions in pl/sql and how are they different?
