How many values can a IN operator contain in oracle 9i ..i mean if i have a query saying emp_no in (100,200,300,400 etc etc)..what is the maximum number of values that the IN operator allows?Thanks for your time ..
There is no direct limitation on the number of values in this list.
You can use IN with sub-select statement that may return any number of values:
IN (SELECT emp_no from employees)
The only real restriction is the max length of SQL statement - 4GB.
i get this error when using a query from an asp page ..
Microsoft OLE DB Provider for ODBC Drivers error '80004005'
[Microsoft][ODBC driver for Oracle][Oracle]ORA-01795: maximum number of expressions in a list is 1000
and part of my query looks like this..
sqlWHERE = "synoRoadmap.prty_code in " & Chaine_ListeComboProdType
sqlWHERE = sqlWHERE & " AND synoRoadmap.prod_code in " & Chaine_ListeProdCode(here i get more than 1000 products)
sqlWHERE = sqlWHERE & " AND synoRoadmap.regi_code = '" & Chaine_RegiCode &"'"
sqlWHERE = sqlWHERE & " AND synoRoadmap.regi_code = region.regi_code "
There is a work-around for this problem. I dont know how far this solution wld help u. here it is ...
I CREATED A TABLE NZTB1
create table nztb1 ( col1 number(10));
INSERTED 1000 RECORDS INTO IT.
declare
n number(10);
begin
for n in 1..1000
loop
insert into nztb1 values (n);
end loop;
commit;
end;
CHECKED THE 1000 ROW COUNT
select count(1) from nztb1;
NOW IF I USE A NORMAL IN CLAUSE WITH MORE THAN 1000 ELEMENTS, IT GIVES THE SAME ERROR AS WHAT U GET ... NOTE AFTER THE LOOP I HAVE ADDED 1 MORE ELEMENT SO THAT THE ELEMENTS IN THE IN CLAUSE BECOME 1001
declare
sqlstmt varchar2(13000);
ctr number(10);
begin
sqlstmt := '';
for n in 1..1000
loop
sqlstmt := sqlstmt || n || ', ';
end loop;
sqlstmt := sqlstmt || ' 0';
sqlstmt := 'select count(1) from nztb1 where col1 in ( ' || sqlstmt || ' )';
execute immediate sqlstmt into ctr;
dbms_output.put_line(ctr);
end;
NOW FOR THE WORK-AROUND. I DONT KNOW HOW FAR THIS WOULD WORK FOR U .. FOR ME IT WORKED BECAUSE THE LENGHT SQLSTMT IS LESS THAN 32767 CHARACTERS..
WHAT I AM DOING IS I PREPARED A SELECT INSIDE THE IN CLAUSE WITH UNION OF ALL VALUES ... FOR ME IT WORKED FINE. BUT I WLD ADVISE TO CHECK THE SPEED ISSUE OF THIS PROCEDURE ALSO BECUASE I AM USING AN UNION
declare
sqlstmt varchar2(32767);
ctr number(10);
begin
sqlstmt := '';
for n in 1..1000
loop
sqlstmt := sqlstmt || ' select ' || n || ' from dual ' || ' UNION ';
end loop;
sqlstmt := sqlstmt || ' select 1 from dual ';
sqlstmt := 'select count(1) from nztb1 where col1 in ( ' || sqlstmt || ' )';
execute immediate sqlstmt into ctr;
dbms_output.put_line(ctr);
end;
the problem was solved long ago but was posting this now..we changed the sql so instead of expression we used subquery from temporary table..thanks OMC2000
0
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The work around is getting values by a subquery. You could select all that keys from some table, even temporary one.