Comments for The Oracle Sponge

Comment on Little Changed by David Aldridge

David Aldridge — Fri, 08 Mar 2013 10:00:22 +0000

Ah, maybe I will — the seperate account thing on the different stackexchnage sites drives me crazy though. I’ve tried do that a number of times but never really cared enough to make much effort.

Actually, maybe it’s the openid auth system that I hate most of all. It’s a pretty close run race.

Comment on Little Changed by Phil

Phil — Fri, 08 Mar 2013 02:42:54 +0000

Stop using SO! Come and join us on dba.stackexchange.com

Comment on Little Changed by Jeff Kemp

Jeff Kemp — Wed, 06 Mar 2013 05:01:30 +0000

You can tell a lot about someone from the their StackOverflow tags… :)

Comment on Applying Predicates and Partition Pruning to MERGE Target Tables by radiofreetooting

radiofreetooting — Tue, 05 Mar 2013 11:04:55 +0000

Just to let you know, even brief notes can be useful. This one didn’t solve my actual problem but it was a powerful nudge in the right direction. So thanks.

Comment on Solving ORA-24172: rule set %s.%s has errors by brennanr2

brennanr2 — Tue, 08 May 2012 17:48:30 +0000

Great post. This really helped me out with an issue I had. I believe in the end my rule_set was ‘corrupt’ because I had one rule pointing to a step that had been dropped, but looking over about 30 rules didn’t make this easy to see. I ended up using the extract ddl queries you demonstrated to rebuild my chain from scratch.

Comment on Interviewing: The difference between Delete and Truncate in Oracle by priya

priya — Tue, 06 Mar 2012 10:59:12 +0000

Truncate an Delete both are used to delete data from the table. These both command will only delete data of the specified table, they cannot remove the whole table data structure.Both statements delete the data from the table not the structure of the table.

TRUNCATE is a DDL (data definition language) command whereas DELETE is a DML (data manipulation language) command.

You can use WHERE clause(conditions) with DELETE but you can’t use WHERE clause with TRUNCATE .

You cann’t rollback data in TRUNCATE but in DELETE you can rollback data.TRUNCATE removes(delete) the record permanently.

A trigger doesn’t get fired in case of TRUNCATE whereas Triggers get fired in DELETE command.

If tables which are referenced by one or more FOREIGN KEY constraints then TRUNCATE will not work.

TRUNCATE resets the Identity counter if there is any identity column present in the table where delete not resets the identity counter.

Delete and Truncate both are logged operation.But DELETE is a logged operation on a per row basis and TRUNCATE logs the deallocation of the data pages in which the data exists.

TRUNCATE is faster than DELETE.

Comment on Interviewing: The difference between Delete and Truncate in Oracle by priya

priya — Tue, 06 Mar 2012 10:58:34 +0000

TRUNCATE is a DDL (data definition language) command whereas DELETE is a DML (data manipulation language) command.

You can use WHERE clause(conditions) with DELETE but you can’t use WHERE clause with TRUNCATE .

Comment on Banned By Burleson! by Interesting public opinion | Don Burleson Fraud

Interesting public opinion | Don Burleson Fraud — Wed, 05 Oct 2011 15:31:31 +0000

[...] http://oraclesponge.wordpress.com/2005/04/11/banned-by-burleson/ [...]

Comment on The “OVERLAPS” Predicate by SelectDistinct

SelectDistinct — Tue, 27 Sep 2011 14:38:01 +0000

with test_data as
(select date ’2007-01-01′ from_dt, date ’2007-12-01′ to_dt from dual union all
select date ’2007-04-01′ from_dt, date ’2007-08-01′ to_dt from dual union all
select date ’2007-07-01′ from_dt, date ’2007-08-01′ to_dt from dual union all
select date ’2007-10-01′ from_dt, date ’2008-02-01′ to_dt from dual union all
select date ’2008-01-01′ from_dt, date ’2008-12-01′ to_dt from dual)
select *
from test_data t1,
test_data t2
where t1.from_dt < t2.to_dt and t1.to_dt > t2.from_dt;

Comment on The “OVERLAPS” Predicate by SelectDistinct

SelectDistinct — Tue, 27 Sep 2011 14:37:09 +0000

overlaps is not really needed..