Is TRUNCATE faster than drop?
TRUNCATE is a DDL(Data Definition Language) command. It is used to delete all the tuples from the table. The TRUNCATE command is faster than both the DROP and the DELETE command. Like the DROP command we also can’t rollback the data after using the this command.
What is the difference between TRUNCATE and delete?
Unlike the DELETE command, the TRUNCATE command is fast. We cannot rollback the data after using the TRUNCATE command….Difference between DELETE and TRUNCATE.
| S.NO | Delete | Truncate |
|---|---|---|
| 1. | The DELETE command is used to delete specified rows(one or more). | While this command is used to delete all the rows from a table. |
How do I TRUNCATE a large table?
4 Answers
- Truncate table.
- Script out the table, then drop table and recreate the table using the script.
- Assuming the table has a PK, then create a similar table, and using partition switch in/out to switch the table to the new table, and then drop the newly created table.
How long should a TRUNCATE table take?
1 Answer. A millisecond or so. Truncate is O(1) – a pure metadata operation. This is assuming there is no concurrent activity on the table.
How long does a TRUNCATE take?
1 Answer. If there are zero transactions locking the table schema, the TRUNCATE TABLE command will finish near-instantaneously. The most i have waited so far was 0.1 seconds for truncating a 25GB table.
Why does truncate or drop table take so long?
The seems to be the most likely reason for DROP/TRUNCATE taking a long time. Run sp_who2 and check the values in tbe Blk column. Any non-zero value in that column is the spid blocking the spid on that row. So check if any blocked spid is your TRUNCATE/DROP process.
Why does TRUNCATE statement take too much time?
I have read on some links that if a table is used by another person or some locks are applied then truncate takes too long time but here I am the only user and I have applied no locks on that. Also no other transactions are open when I tried to truncate the table.
Is it normal to use truncate table in MySQL?
I am using truncate table table_name; on a table with around 1 million rows, but it’s been taking too long, running since last 3 hours. Is it normal?
What to do if your truncate table gets stuck?
Rather than figuring out where in the plumbing of TRUNCATE TABLE it is getting stuck, you may just have to take matters into your own hands by replacing this This may just offline the problem (perhaps hanging on the DROP TABLE ), but the table becomes available quickly. DROP TABLE has been improved in MySQL 5.5.23.