Oracle-L: RE: how to do a variable in-list of numbers?

From: Igor Neyman <ineyman_at_perceptron.com>
Date: Fri, 29 Aug 2003 11:34:34 -0800
Message-ID: <F001.005CE04A.20030829113434@fatcity.com>

This method works; I have some code using it. The only problem, it could be slow (on large tables), because index on <code_column> will not help.

Igor Neyman, OCP DBA
ineyman_at_perceptron.com

-----Original Message-----
Chelur, Jayadas {PBSG}
Sent: Friday, August 29, 2003 10:45 AM
To: Multiple recipients of list ORACLE-L

SELECT <columns>

FROM	 <sometable>
WHERE	 INSTR(','||<list_of_comma_separated_codes>||',' ,
               ','||<code_column>||',' ) > 0;


(1). Concatenate Commas at BOTH ENDS of the string containing
     different code values. e.g. If the string is 
     '101,102,554,336,678,301,201,199' , the concatenate commas
     on both ends to make it ',101,102,554,336,678,301,201,199,'

     this is to make sure that EVERY code ( including the first
     and the LAST ) confirms to the pattern <,><value><,>

(2)  For each row in the table, use INSTR() function to see whether
     the pattern <,><value of columna><,> is CONTAINED in the string

     INSTR() is used so that pattern matching can be used instead of
     any range checking etc on the string. The actual code values in
     the string can be IN ANY ORDER.

-----Original Message-----
Sent: Friday, August 29, 2003 10:32 AM
To: Multiple recipients of list ORACLE-L

I need to do an insert select of the form

insert into tab2
select col1
from tab1
where col2 in (inlist of numbers);

I do not know how many values will be in my inlist at runtime. With strings
I just build a big string. How do I build an 'inlist' of numbers at runtime?

Im using a cursor to determine which values need to be added to my inlist. I
think I can do some kind of cast, but im not familiar with it.

Im on 8i. I do not want to j ust run this inside my cursor. It could then
execute 300-400 times and will run all day.

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INET: rgaffuri_at_cox.net

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Author: Chelur, Jayadas {PBSG}
INET: Jayadas.Chelur_at_pepsi.com

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Please see the official ORACLE-L FAQ: http://www.orafaq.net
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Author: Igor Neyman
INET: ineyman_at_perceptron.com

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