The SQL TRUNCATE
statement is used to remove all data from a table, but unlike the DROP
statement, it does not delete the table structure or any associated indexes, constraints, triggers, or permissions. The TRUNCATE
statement is faster than the DELETE
statement for removing all data from a table, as it operates at the data file level, rather than the row level.
Here’s an example of using the TRUNCATE
statement in SQL:
TRUNCATE TABLE table_name;
For example, if you have a table named employees
, you can remove all data from this table with the following SQL statement:
TRUNCATE TABLE employees;
After executing this statement, the employees
table will be empty, but its structure, along with any associated indexes, constraints, triggers, or permissions, will remain intact.
In conclusion, the SQL TRUNCATE
statement is used to remove all data from a table, but retain its structure, indexes, constraints, triggers, and permissions. It is faster than the DELETE
statement for removing all data from a table, as it operates at the data file level, rather than the row level.
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