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DROP and TRUNC do different things: TRUNCATE TABLE. Removes all rows from a table without logging the individual row deletions. TRUNCATE TABLE is similar to the DELETE statement with no WHERE clause; however, TRUNCATE TABLE is faster and uses fewer system and transaction log resources. DROP TABLE.
Jul 15, 2010 · 6. TRUNCATE TABLE doesn't log the transaction. That means it is lightning fast for large tables. The downside is that you can't undo the operation. DELETE FROM logs each row that is being deleted in the transaction logs so the operation takes a while and causes your transaction logs to grow dramatically.
Sep 26, 2008 · TRUNCATE is the DDL statement whereas DELETE is a DML statement. Below are the differences between the two: As TRUNCATE is a DDL (Data definition language) statement it does not require a commit to make the changes permanent. And this is the reason why rows deleted by truncate could not be rollbacked.
Sep 10, 2015 · Truncate Drop Delete Speed [Fast] Slow Slowest Rolback possibility No No [Yes] Specifiable conditions No No [Yes] Scope All records All record+Headers Some records/All records =whole table Cascading effects No* No* [Yes]** **For example: in a Table_1 there is a PK, in Table_2 there is a FK that relates with the PK of Table_1, other words there is referential integrity.
DELETE will scan the table to generate a count of rows that were affected. delete from tablename; This lets you filter which rows to delete based on an optional WHERE clause. Use this when you want to delete specific records, eg: DELETE FROM tablename WHERE username = 'joe'. answered Jan 6, 2010 at 13:01.
The DROP TABLE statement is used to delete a table. DROP TABLE table_name. The DELETE statement is used to delete data (records) in a table. DELETE FROM table_name WHERE some_column=some_value; So, as you want to delete table from database then you will go for DROP Command. answered Aug 24, 2014 at 18:46. Debasish Pati.
Nov 10, 2014 · 7. Drop will do just that....drop the table in question, unless the table is a parent to another table. Delete will remove all the data that meets the condition; if no condition is specified, it'll remove all the data in the table. Truncate is similar to delete; however, it resets the auto_increment counter back to 1 (or the initial starting ...
9. Delete v/s Drop. Delete statement performs conditional based deletion, whereas Drop command deletes entire records in the table. Delete statement removes only the rows in the table and it preserves the table structure as same, and Drop command removes all the data in the table and the table structure.
Dec 13, 2013 · Difference: Truncate deletes the complete data from the table and next auto increment id will start with 1 whereas Delete will start with next id. Both will keep structure intact and delete data only. with Delete you can use limit whereas with Truncate you can't. edited Sep 29, 2021 at 10:15.
Aug 11, 2011 · I've to duplicate values from one table to another (identical table schemes). What is better (performance): Drop table1 and create as select * from table2. Delete all rows from table1 and insert all rows from table2. Update: I've made a small test on table with almost 3k rows. Drop and create gives about 60ms vs Delete and insert - about 30ms.
