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Oracle Database Interview Question:
How To Delete All Rows a Table in Oracle?
Submitted by: AdministratorIf you want to delete all rows from a table, you have two options:
* Use the DELETE statement with no WHERE clause.
* Use the TRUNCATE TABLE statement.
The TRUNCATE statement is more efficient the DELETE statement. The tutorial exercise shows you a good example of TRUNCATE statement:
SELECT COUNT(*) FROM ggl_links;
COUNT(*)
----------
3
TRUNCATE TABLE ggl_links;
Table truncated.
SELECT COUNT(*) FROM ggl_links;
COUNT(*)
----------
0
Submitted by: Administrator
* Use the DELETE statement with no WHERE clause.
* Use the TRUNCATE TABLE statement.
The TRUNCATE statement is more efficient the DELETE statement. The tutorial exercise shows you a good example of TRUNCATE statement:
SELECT COUNT(*) FROM ggl_links;
COUNT(*)
----------
3
TRUNCATE TABLE ggl_links;
Table truncated.
SELECT COUNT(*) FROM ggl_links;
COUNT(*)
----------
0
Submitted by: Administrator
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