How to index through columns

How do you index through a set of Columns Programmatically using SQL. I have a Table all the columns have the same data for different dates. Column names are Col_0, Col_1, Col_2,....Col_100, Col_101. I need to perform the same calculation on each column to manipulate the data into a different table. Is it possible to do a While loop that changes the Column name in a SELECT statement. I have tried to do this but can't seem to get it to work. Please help !

You could set up a cursor using syscolumns.

Run this in QA after changing the table name:

select colid, name
from syscolumns
where id = (
select id
from sysobjects
where name = 'MyTableName')
order by colid

That should give you an idea of how to use that. You can dynamically build SQL using your cursor and execute it. There may be something more elegant, but I've used this successfully in the past.

|||Thank PDraigh I will try it

How to improve speed of query MSDE 2000

Hi All
I am having trouble with query timeouts in a VB6 program using MSDE 2000 (on
local PC)
It only happens when querying between certain dates ( surprisingly it occurs
when the dates are closer together and hence less records exists)
e.g if date range is 1/8/05 to 1/9/05 query doesn't timeout
if date range 25/8/05 to 1/9/05 it does?
code.....
sql = "select [prod_code], sum(qty) as amount, sum(qty * price) as myprice
from [idetail] where [inv_num] in (Select inv_num from Invoice where
inv_date between '" & Format(DT1.Value, "YYYY-MM-DD") & "' and '" &
Format(DT2.Value, "YYYY-MM-DD") & "') group by prod_code order by prod_code"
rs.Open sql, cn, adOpenKeyset, adLockReadOnly
I have no primary keys or indexes on the idetail table
Any ideas
Regards
Steve
hi Steve,
steve wrote:
> Hi All
> I am having trouble with query timeouts in a VB6 program using MSDE
> 2000 (on local PC)
> It only happens when querying between certain dates ( surprisingly it
> occurs when the dates are closer together and hence less records
> exists)
> e.g if date range is 1/8/05 to 1/9/05 query doesn't timeout
> if date range 25/8/05 to 1/9/05 it does?
> code.....
> sql = "select [prod_code], sum(qty) as amount, sum(qty * price) as
> myprice from [idetail] where [inv_num] in (Select inv_num from
> Invoice where inv_date between '" & Format(DT1.Value, "YYYY-MM-DD") &
> "' and '" & Format(DT2.Value, "YYYY-MM-DD") & "') group by prod_code
> order by prod_code"
> rs.Open sql, cn, adOpenKeyset, adLockReadOnly
> I have no primary keys or indexes on the idetail table
>
a proper indexing schema (as long as a proper primary key, which is always
usefull :D) should always help... but this should not be a related
problem... your actual plan should always be a table scan, followed by a
sort operation, but again, should not be related...
do you have actual lock pending on the table during the failing projections?
try executing
EXEC sp_lock
http://msdn.microsoft.com/library/de...la-lz_6cdn.asp
and
EXEC sp_who
http://msdn.microsoft.com/library/de...wa-wz_3v8v.asp
to determin eventual lock conditions..
Andrea Montanari (Microsoft MVP - SQL Server)
http://www.asql.biz/DbaMgr.shtmhttp://italy.mvps.org
DbaMgr2k ver 0.15.0 - DbaMgr ver 0.60.0
(my vb6+sql-dmo little try to provide MS MSDE 1.0 and MSDE 2000 a visual
interface)
-- remove DMO to reply

How to ignore timepart when using LookUp with date.

Hi

I want to lookup the datekeys from my datedimension. However it does not work because matching for same dates does not work because of different timeparts. The dates in my lookup-table have a 00:00:00 timepart, but the dates in my input table have a non-zero timepart. How can I ignore the timeparts or make the timeparts zero?

Regards,
HenkI found a workaround:

add a derived column component before and cast to DT_DBDATE first and than back to DT_DBTIMESTAMP to get rid of the timepart: (DT_DBTIMESTAMP)(DT_DBDATE)DateColumn.

I am still interested in a solution that doesn't require an extra component.

Henk|||Can you not use T-SQL to change the data at source?

-Jamie|||Yes that's true, but the sports of SSIS is in doing it without coding T-SQL