I'm relatively new to SQL, and am frequently running into the same problem,
How do I compare different rows in a result?
for example:
If I have a table of events consisting of a time stamp and the event type:
timestamp, event_type
12:00 a
12:10 b
12:20
Hello:
I have a couple of queries that are giving me headaches.
They are actually very simple, but I do not understand why
I am not getting the expected results. Maybe I need new glasses.
Please be kind.
The table definitions are below.
The table TMP_INDEX_MEMBER contains 21057
On Wednesday 29 October 2008 18:39:42 Kevin Duffy wrote:
Hello:
I have a couple of queries that are giving me headaches.
They are actually very simple, but I do not understand why
I am not getting the expected results. Maybe I need new glasses.
Please be kind.
The table
Gentlemen:
Thanks so much for your assistance.
This returns 512 rows.
select * from tmp_index_member tim
where tim.ISIN NOT IN
(select ISIN from security sec
where ISIN is NOT NULL and
securitytypekey IS NOT NULL and securitytypekey NOT IN ( 5,27) )
Can someone explain why
On Wednesday 29 October 2008 21:56:14 Kevin Duffy wrote:
Gentlemen:
Thanks so much for your assistance.
This returns 512 rows.
select * from tmp_index_member tim
where tim.ISIN NOT IN
(select ISIN from security sec
where ISIN is NOT NULL and
securitytypekey IS NOT
On Wed, Oct 29, 2008 at 4:23 PM, Tom Lane [EMAIL PROTECTED] wrote:
[EMAIL PROTECTED] writes:
There is a way to 'correct' or blank the values somehow? I guess im going
to lose some data, iisnt...
If you can tolerate losing the data on that page, just zero out the
entire 8K page. dd from
Scott Marlowe [EMAIL PROTECTED] writes:
On Wed, Oct 29, 2008 at 4:23 PM, Tom Lane [EMAIL PROTECTED] wrote:
If you can tolerate losing the data on that page, just zero out the
entire 8K page. dd from /dev/zero is the usual tool.
Would zero_damaged_pages work here? I know it's a shotgun to
On Wed, Oct 29, 2008 at 6:36 PM, Tom Lane [EMAIL PROTECTED] wrote:
Scott Marlowe [EMAIL PROTECTED] writes:
On Wed, Oct 29, 2008 at 4:23 PM, Tom Lane [EMAIL PROTECTED] wrote:
If you can tolerate losing the data on that page, just zero out the
entire 8K page. dd from /dev/zero is the usual
On Wed, Oct 29, 2008 at 7:24 PM, Scott Marlowe [EMAIL PROTECTED] wrote:
Oh, and to reply to myself and the original poster, you need to figure
out what's causing the pages to get damaged. IT's usually bad
hardware, then a buggy driver, then a buggy kernel / OS that can cause
it. Run lots of
Kevin Duffy [EMAIL PROTECTED] writes:
Can someone explain why the NULL ISINs in Security is causing
so much grief? I do not get it.
NULL generally is taken as unknown in SQL comparisons. So if you have
any nulls in the output of the sub-select, what the upper select sees
is a situation like
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