Hi
I think it was mentioned already,
But case studies with real working examples (maybe include the scripts for
demo environment) usually make things a lot more clear than plain text and
syntax diagrams.
Jack
"Freeman, Robert
" To: Multiple recipients of list
ORACLE-L <[EMAIL PROTECTED]>
<Robert_Freeman@c cc: (bcc: Jack van
Zanen/nlzanen1/External/MEY/NL)
sx.com> Subject: Rman ... what do YOU need
Sent by:
[EMAIL PROTECTED]
09-04-2002 19:53
Please respond to
ORACLE-L
I'm contemplating doing an Rman backup and recovery handbook. I'm wondering
what you would like to see in such a book and would you use such a book?
Ideas and comments welcome.
Robert G. Freeman - Oracle8i OCP
Oracle DBA Technical Lead
CSX Midtier Database Administration
The Cigarette Smoking Man: Anyone who can appease a man's conscience can
take his freedom away from him.
-----Original Message-----
Sent: Monday, April 08, 2002 2:54 PM
To: Multiple recipients of list ORACLE-L
I don't think you can do it.. I mean, you could change it to trunc the
oracle_date field (that eliminates the minutes) and then do a to_date
of :b1 but you will still be operating on the oracle_date field.
Okay, I HATE to suggest this, but since the table is small:
add another field to the table oracle_date_2 as a date field. Update
the table set oracle_date_2=trunc(oracle_date)
add a trigger to fill in oracle_date_2 when you insert a row or update
the oracle_date column
create an index on oracle_date_2 and change the query to use that
column
--- [EMAIL PROTECTED] wrote:
>
> I've got the following SQL statement that is running very long on a
> nightly
> data load. The problem is the TO_CHAR function which is preventing
> me from using the index on this small (20,000-row table).
>
> This is an 8.0.4 database so it is not possible for me to use
> make this a function-based index.
>
> The problem is that the date field has minutes, etc. included and
> those need to be eliminated before the comparison can be made.
> That's why I can't just eliminate the TO_CHAR from both sides
> of the equation.
>
> Isn't there a way that I can pull this function out of the select
> statement
> and do it in a preceeding statement? Then I could just pass in both
> variables to this statement without the TO_CHAR and use my index.
>
> Is this realistic? How, exactly could it be done?
>
>
> SELECT DATE_KEY
> FROM DATE_DIM
> WHERE TO_CHAR(ORACLE_DATE,'DD-MON-YYYY') =
> TO_CHAR(:b1,'DD-MON-YYYY')
>
>
> SQL> desc date_dim;
> Name Null? Type
> ------------------------------- -------- ----
> DATE_KEY NOT NULL NUMBER(5)
> ORACLE_DATE NOT NULL DATE
> DATACOM_DATE NUMBER(6)
> DATACOM_REVERSE_DATE NUMBER(6)
> DAY_OF_WEEK NOT NULL VARCHAR2(30)
> DAY_NUMBER_IN_MONTH NOT NULL NUMBER(3)
> DAY_NUMBER_OVERALL NOT NULL NUMBER(9)
> WEEK_NUMBER_IN_YEAR NOT NULL NUMBER(3)
> WEEK_NUMBER_OVERALL NOT NULL NUMBER(7)
> MONTH NOT NULL VARCHAR2(30)
> MONTH_NUMBER_OVERALL NOT NULL NUMBER(7)
> YEAR NOT NULL NUMBER(5)
> WEEKDAY_IND NOT NULL CHAR(1)
> LAST_DAY_IN_MONTH_IND NOT NULL CHAR(1)
> DATA_WAREHOUSE_MOD_DATETIME NOT NULL DATE
> DATA_MART_MOD_DATETIME NOT NULL DATE
>
>
>
> SQL> select oracle_date from date_dim where rownum=1;
>
> ORACLE_DA
> ---------
> 01-JAN-70
>
>
> Thanks in advance for any help.
>
> Cherie Machler
> Oracle DBA
> Gelco Information Network
>
>
>
>
>
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
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