Cursor in another cursor. how?

i have a program like this
DECLARE
V_VARIABLE1 VARCHAR2(10);
CURSOR_ABC IS select...............;
BEGIN
OPEN CURSOR_ABC;
LOOP
FETCH CURSOR_ABC INTO V_VARIABLE1;
EXIT WHEN CURSOR_ABC%NOTFOUND;
WHAT IF I WANT TO INSERT ANOTHER SAME KINDA CURSOR LOOP HERE LIKE*
CURSOR_XYZ IS select...............;
BEGIN
OPEN CURSOR_XYZ;
LOOP
FETCH CURSOR_XYZ INTO V_VARIABLE2;
EXIT WHEN CURSOR_XYZ%NOTFOUND;
END LOOP;
CLOSE CURSOR_XYZ;
END LOOP;
CLOSE CURSOR_ABC;

Gul wrote:
i have a program like this
DECLARE
V_VARIABLE1 VARCHAR2(10);
CURSOR_ABC IS select...............;
BEGIN
OPEN CURSOR_ABC;
LOOP
FETCH CURSOR_ABC INTO V_VARIABLE1;
EXIT WHEN CURSOR_ABC%NOTFOUND;
WHAT IF I WANT TO INSERT ANOTHER SAME KINDA CURSOR LOOP HERE LIKE*
CURSOR_XYZ IS select...............;
BEGIN
OPEN CURSOR_XYZ;
LOOP
FETCH CURSOR_XYZ INTO V_VARIABLE2;
EXIT WHEN CURSOR_XYZ%NOTFOUND;
END LOOP;
CLOSE CURSOR_XYZ;
END LOOP;
CLOSE CURSOR_ABC;It is your code & you are free to implement what ever you desire.
CURSOR LOOPS are row by row & SLOW by SLOW!
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SQL and PL/SQL FAQ

Similar Messages

Using a Cursor in another cursor

Hi Guys,
I have declared a cursor in one of my program unit in forms 6i form, like this:
Declare
Cursor C1 is select employee_id, emp_name from employees;
Begin
End;
Now i have to declare an other cursor that will be using the employee_id of the cursor C1.
for example :
Declare
Cursor C1 is select employee_id, emp_name from employees;
Cursor C2 is select C1.Employee_id, Employees.Age
from C1, employees;
Begin
End;
I dont think we can do this.... as it gives error in forms. What is the alternate how can i reference a cursor in another cursor??
Kindly Help Pliz, Imran Baig

Imran,
you can do this. The way you try to read from a cursor is not correct because you treat a cursor like a table which it isn't. You have to loop through the parent cursor and then within this loop, loop the second cursor. Please see the PLSQL documentation on OTN on how to do this (its not that big of a deal).
Frank

Create cursor from another cursor

Hello,
How do I create a cursor from the values of another cursor ?
For Example,
cursor c1
select x, y from table 1;
cursor c2
select c1.x, c1.y, table 2.z
from table 2
where y := c1.y
I get errors when I do this way. Can somebody help me out on this.
Thanks
Raj

In this particular example, it's probably easiest to declare a single cursor that contains a join, i.e.
cursor c1
SELECT a.x, a.y, b.z
FROM table1 a,
table2 b
WHERE a.y = b.yIf you really want to create the two cursors, though, you have to make sure that the first cursor is visible to the creation statement of the second. For example,
for c1 in (select x, y from table1)
loop
for c2 in (select c1.x, c1.y, b.z from table2 b where b.y = c1.y)
loop
end loop;
end loop;If you need more help, quoting the exact error an providing a snippet of the code you're using would be greatly helpful.
Justin

Copying value from one cursor to another

Hi,
I have a problem while copying values from one cursor to another cursor.
The code looks like below.
PROCEDURE XYZ
            TransactionResultSet OUT NOCOPY types.ref_cursor,
IS
            temp_cursor types.ref_cursor;
            wip_rec types.ref_cursor;
BEGIN
DECLARE
                CURSOR temp_cursor IS
            SELECT ...........
END;
BEGIN
    FOR wip_rec IN temp_cursor
    LOOP
    update tinsagr set something
    where {the condition}
        IF SQL%ROWCOUNT = 0 THEN
dbms_output.put_line('this is test ');
        Fetch wip_rec into TransactionResultSet;
     END IF;
   END LOOP;so basically i want to iterate the "temp_cursor" and depending on the values i get it from here i shall update a table. Actually i want to exclude few records from "temp_cursor" and add it/copy rest of the records to "TransactionResultSet"
That means say initially " temp_cursor" has 100 records and i updated 5 records in a table and same number of records should be excluded and rest should be added to the output cursor TransactionResultSet.
How do i achieve it?
while saving i am getting
(1): PLS-00456: item 'WIP_REC' is not a cursor.
Do any one has any idea what to do in such scenario?

There are options like....
SQL> CREATE OR REPLACE TYPE emp_obj AS OBJECT (ename VARCHAR2(50), dept NUMBER);
2 /
Type created.
SQL> CREATE OR REPLACE TYPE emp_tbl IS TABLE OF emp_obj;
2 /
Type created.
SQL> set serverou on
SP2-0158: unknown SET option "serverou"
SQL> set serverout on
SQL> DECLARE
2    rc      sys_refcursor;
3    v_ename emp.ename%TYPE;
4    v_dept emp.deptno%TYPE;
5    ---End Of Local Varriable Declaration
6    --Procedire declaration !
7    PROCEDURE TEST_CUR(pi_out_ref_cur IN OUT sys_refcursor) IS
8      emp_rec emp_tbl;
9    BEGIN
10      /* This BULK COLLECT can be done with explicit cursor,Ref Cursor
11      with some simple modification, Here I have used implicit cursor! */
12      SELECT emp_obj(ename, deptno) --Casting as the object
13      BULK COLLECT
14        INTO emp_rec
15        FROM emp
16       WHERE deptno = 10;
17
18      dbms_output.put_line('Records selected are:');
19      FOR i in 1 .. emp_rec.COUNT LOOP
20        dbms_output.put_line(emp_rec(i).ename || '--' || emp_rec(i).dept);
21      END LOOP;
22      --Now we are filtering the record and may be doing some operation with each record.
23      FOR i in 1 .. emp_rec.COUNT LOOP
24        IF emp_rec(i).ename = 'KING' THEN
25          --You can change this IF according to your need.
26          emp_rec.DELETE(i);
27        END IF;
28      END LOOP;
29      OPEN pi_out_ref_cur FOR
30        SELECT * FROM TABLE(emp_rec); --Using the TYPE AS table.
31    END TEST_CUR;
32    /* Main execution or procedure calling section*/
33 BEGIN
34    --Actual calling
35    TEST_CUR(rc);
36    dbms_output.new_line;
37    dbms_output.put_line('Now in Ref Cursor');
38    dbms_output.put_line('****************');
39    LOOP
40      FETCH rc
41        INTO v_ename, v_dept;
42      dbms_output.put_line(v_ename || '--' || v_dept);
43      EXIT WHEN rc%NOTFOUND;
44    END LOOP;
45
46 END;
47 /
Records selected are:
CLARK--10
KING--10
MILLER--10
Now in Ref Cursor
CLARK--10
MILLER--10
MILLER--10
PL/SQL procedure successfully completed.
SQL>

How can I create cursors within the cursor?

How can I create cursors within the cursor?
Table1 2001 - 2007 data
Account_no
Account_eff_dt
No_account_holder
Num
Seq_Num
Value1
Value2
Table2_Historical (doesn't have Num as a field) 1990 - 2000 data
Account_no
Account_eff_dt
No_account_holder
Seq_Num
Value1
Value2
Table3_06
Account_no
Account_eff_dt
No_account_holder
Num
My result table should be:
Table_result_06
Account_no
Account_eff_dt
No_account_holder
Num
Value1_min (the minimum value for the minimum of record_sequence)
Value2_max (the maximum value for the maximum of record_sequence)
I have to get data from Table1 and Table2_Historical. If one account was open in 1998 and is still effective, the minimum value of that account is in the Table2_Historical.
Let's say I open a cursor:
cursor_first is
select * from table3_06;
open csr_first
loop
fetch cursor_first into
v_Account_no
v_Account_eff_dt
v_No_account_holder
v_Num
EXIT WHEN csr_first%NOTFOUND;
How can I open a second cursor from here that will get the Seq_Num from Table1
csr_second
select Seq_Num from Table1 where
v_Account_no = Account_no
v_Account_eff_dt <= Account_eff_dt
v_No_account_holder=No_account_holder
v_Num = Num
How does it works???
Thanks a lot

Thanks so much for replying back. Here is what I am trying to do.
I have to create a table for each year 2002, 2003, 2004, 2005, 2006 that has all the account numbers that are active each year plus some other characteristics.
Let’s say I will create Table_result_06. This table will have the following fields. The account number, account effective date, Number of the account holder and the field Num (The primary key is a combination of all 4 fields), the beginning look of value 1 in 2006, the last look of value 1 in 2006.
Table_result_06
Account_no key
Account_eff_dt key
No_account_holder key
Num key
Value1_min (the minimum value for the minimum of record_sequence)
Value2_max (the maximum value for the maximum of record_sequence)
All the active account numbers with the Account_eff_dt, No_account_holder and Num are in the Table3. As such I can build a query that connects Table3 with table Table1 on all 4 fileds, Account_no, Account_eff_dt, No_account_holder, Num and find the Value1_min for the min of req_sequence in 2006 and Value1_max for the max of req_sequence in 2006. Here my problem starts.
Table 1 doesn’t have a new entry if nothing has changed in the account. So if this account was open in 1993 and nothing has changed I don’t have an entry in 2006 but this doesn’t mean that this account doesn’t exist in 2006. So to find the minimum value I have to go back in 1993 and find the max and min for that year and that will be max and min in 2006 as well.
As such I have to go to Table_2 historical and search for min and max. But this table doesn’t have the field NUM and if I match only on the Account_no, Account_eff_dt and No_account_holder I don’t get a unique record.
So how can I connect all three tables, Table 1 for max and min, if it doesn’t find anything will go to table 2 find the two values and populate Table_result_06.
Thanks so much again for your hep,

Automatic Cursor Movement in one Graph, in accordance to the cursor in another graph

I am using two XY graphs each with 4 cursors. I want to assign each cursor of graph A to each cursor of graph B such that the corresponding cursors in graph B moves in accordance to the cursors in graph A.
I have used Active cursor, Cursor.PosX and it works for one cursor. However when I use the same concept to change the active cursor value and faciliate the automatic movement for all cursors they do not work.
Message Edited by Chathuri on 08-13-2009 06:26 AM
Solved!
Go to Solution.

Hi,
As requested I would like to post the solution as to how I tacked the problem. It was actually small mistake on my part. When I connect the two property nodes for each XY graphs I should connect ActiveCursor to ActiveCursor and Cursor.PosX to Cursor.PosX. What I did was connect the Active cursor of A graph to the cursor.index of B graph. I have attached a small screen shot of connecting the first cursor of A graph to the 1st cursor of B graph so that the cursor in B graph follows the cursor in A graph.
In order to connect more cursors as in my case, the only change to be made is the change in the Acitve cursor constant to, 1,2,......
Chathuri
Attachments:
CursorMovement.JPG ‏7 KB

How to Execute sql query in PL/SQL ( a variable) with out using Cursor or REF cursor

Hi
I am building a dynamic query based on some conditions
as an example
v_query varchar2(2000);
x1 varchar2(20);
y1 varchar2(20);
z1 varchar2(20);
v_query := ' Select x,y,z into x1,y1,z1 From ... ';
Is there any way to execute the query with out using cursor or ref cursor..
Thanks
Arun

Both Tod and Eric provided valid responses given the format of the queory you supplied. Howver, if you want to use dynamic sql in either way, you need to be absolutely certain that your query will always only return a single row (e.g. SELECT COUNT(*) FROM mytable), because if it retuns more than one, your procedure will break unless you have an exception handler to handle either TOO_MANY_ROWS or OTHERS.
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Cursor value into cursor

Hi all;
help please. I want to create a cursor which takes value from another cursor so as to limit the rows, in same procedure. how can I do this?
Thanks
vg.

vg,
If I have understood your question right, the following might help : (Tried out in the SCOTT schema)
DECLARE
CURSOR cdept IS
SELECT DEPTNO
FROM DEPT;
CURSOR cemp(dept varchar2) IS
SELECT EMPNO, ENAME
FROM EMP
WHERE DEPTNO = dept;
ldeptno dept.deptno%TYPE;
lempno emp.empno%TYPE;
lename emp.ename%TYPE;
BEGIN
OPEN cdept;
LOOP
FETCH cdept INTO ldeptno;
EXIT WHEN cdept%NOTFOUND;
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LOOP
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Converting cursor to ref cursor in Report builder pl/sql

Hi,
I am trying to use dynamic sql in My report 's pl/sql code.
I can not use execute Immediate statement since this feature is not suppoerted at client side and i am doing the coding In my local mchine and running the report loaclly.......???
Another way to use dynamic sql is by using dbms_sql package.
Using dbms_sql to run a sql will give me a normal cursor as an output.
Since in report builder pl/sql only ref cursor is allowed as a return type from a function........the problem i m facing is conversion of the cursor to ref cursor......
in oracle 11g we have a built in function in dbms_sql package that can be used for the conversion....
i m using oracle 10 g where the above mentioned feature is not available............
Please give some way to resolve this issue............!!!!!!!!!!!!
Thanks in Advance.....!!!!!!!
Abhishant

You may use some stored procedures that will take full advantage of dynamic SQL. Make a stored proc that inserts rows in a global temporary table. You will call that stored proc in the afterpform trigger. And you will have the report querry select from the temporary table populated by the stored proc.
I did some things like that.
HTH

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Cursor in another cursor. how?

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