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anant_deshmukh21
New User
Joined: 19 Jun 2007
Posts: 2
Location: pune
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| [size=18]any one plz tell me the difference between TRUNCATE TABLE and DROP TABLE |
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a027412
New User
Joined: 05 Jul 2007
Posts: 40
Location: Minneapolis, MN
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to my knowledge, after issuing TRUNCATE command, all the record are deleted and just one record is put in the log. but once the DROP command is issued many records are written to the log. And more over the TRUNCATE command will put the schema in CHK PENDING state and DROP command will not.
Please correct me if am wrong |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
Please post in the correct forum - this has been moved to DB2, if there is some reason to return it to cobol, please advise.
Also, please use the standard size not
fortunately, it wasn't specifiec correctly and did not appear as a shout  |
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0d311
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Hi,
As I know, when you do a TRUNCATE TABLE, you only clear up the data and leave the table as is while when you do a DROP TABLE, you not only get rid of the data, but also get rid of the table in the database.
In any case, your boss wouldn't like you doing any of those in production.  |
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stodolas
Active Member
Joined: 13 Jun 2007
Posts: 632
Location: Wisconsin
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We do the TRUNCATE in production. It is more efficient than a DELETE FROM table_name. It logs one entry in the transaction log, instead of an entry for each delete.
We have tables that get emptied and reloaded from file provided to us by contractors often. |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
Yup, truncate does the housecleaning cheaply and still preserves the structure.
Hopefully, not just everyone has been granted permission to truncate production tables. |
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stodolas
Active Member
Joined: 13 Jun 2007
Posts: 632
Location: Wisconsin
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| We don't even have permission to truncate in Unit. We have to run it through a scheduled job if we are doing that. |
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salehi
New User
Joined: 30 Sep 2006
Posts: 14
Location: Iran
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| TRUNCATE quickly removes all rows from a table. It has the same effect as an unqualified DELETE but since it does not actually scan the table it is faster. This is most useful on large tables |
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