Cursor within a cursor - database

Question

I need your help.
I am trying to make a series of cursors within other cursors.
Below I show you the tables with which I want to make the cursors.
First make the cursor of the first table looking for record.
Second, in table 1 we have the column "ID_ASI", with that column I want to make another cursor that searches inside another table (IMAGE OF TABLE 2) all the "ID_ASI" that it finds with the same "ID_ASI".
Finally, the "ID_ASI" finding by the second step, make a new cursor that looks for all "ID_DOC" that have the same "ID_ASI".
For example,
In the second step, when making the cursor in the "ID_ASI" column, find 3 rows with the same "ID" (101), then the third step searches for all "ID_DOC" with the same "ID_ASI".
For example, "ID_ASI" 101 has 3 "ID_DOC" (value 10), 101 has 2 other values ​​(20) and finally two other values ​​(30).
The complicated thing is how to group them all in the same way, and how to put a cursor inside a cursor.
This would be the result.
Thank you for attention.

Answer 1

To me it looks like what you want is to join the tables together, something like
SELECT t2.*
FROM TABLE_1 t1
INNER JOIN TABLE_2 t2
ON t2.ID_ASI = t1.ID_ASI
ORDER BY t2.ID_ASI, t2.ID_DOC
SQLFiddle here
Best of luck.

Answer 2

Use a hierarchical query:
SQL Fiddle
Oracle 11g R2 Schema Setup:
CREATE TABLE TABLE_1 ( ID_ASI ) AS
SELECT 101 FROM DUAL UNION ALL
SELECT 201 FROM DUAL UNION ALL
SELECT 301 FROM DUAL;
CREATE TABLE TABLE_2 (ID_ASI, ID_DOC, IMPORT, IMPORT_TO ) AS
SELECT 101, 10, NULL, 1000 FROM DUAL UNION ALL
SELECT 101, 20, NULL, 2000 FROM DUAL UNION ALL
SELECT 101, 30, NULL, 3000 FROM DUAL UNION ALL
SELECT 201, 23, NULL, 430 FROM DUAL UNION ALL
SELECT 201, 23, 430, NULL FROM DUAL UNION ALL
SELECT 104, 10, 500, NULL FROM DUAL UNION ALL
SELECT 104, 20, 2000, NULL FROM DUAL UNION ALL
SELECT 104, 10, 500, NULL FROM DUAL UNION ALL
SELECT 104, 30, 3000, NULL FROM DUAL;
Query 1:
SELECT *
FROM TABLE_2
START WITH ID_ASI IN ( SELECT ID_ASI FROM TABLE_1 )
CONNECT BY PRIOR ID_DOC = ID_DOC
AND PRIOR ID_ASI < ID_ASI
ORDER SIBLINGS BY 1, 2, 3, 4
Results:
| ID_ASI | ID_DOC | IMPORT | IMPORT_TO |
|--------|--------|--------|-----------|
| 101 | 10 | (null) | 1000 |
| 104 | 10 | 500 | (null) |
| 104 | 10 | 500 | (null) |
| 101 | 20 | (null) | 2000 |
| 104 | 20 | 2000 | (null) |
| 101 | 30 | (null) | 3000 |
| 104 | 30 | 3000 | (null) |
| 201 | 23 | 430 | (null) |
| 201 | 23 | (null) | 430 |