ORACLE: Getting Data Extract (>50 Million records) in SQL Developer

Question

I am having a set of records say AA : SELECT SINGLE_COLUMN FROM SAMPLE_TABLE1 WHERE SOME_FILTER . It returns a set of numbers

Now I need to execute a query which will get the input from A and get the extract (say B) for that output. B : SELECT COL1,COL2,COL3 FROM SAMPLE_TABLE2 WHERE COL1 IN (A) . Taking input from A the above query will return a result set

This extract is expected to have more than 50 Million records.

I've tried to write a cursor to fetch this but couldn't find the right way.

DECLARE
   CURSOR cur_insert
   IS
      SELECT single_column
        FROM sample_table1
       WHERE some_filter;

   TYPE ty IS TABLE OF output_data_table%ROWTYPE;

   ty_cursor   ty;
BEGIN
   OPEN cur_insert;

   FOR i IN ty_cursor.FIRST .. ty_cursor.LAST
   LOOP
      SELECT col1, col2, col3
        FROM sample_table2
       WHERE col1 IN (i);
   END LOOP;
END;

Need help to find a way to get this big extract. Currently I am having only SQL Developer in my workplace and Input tables are all my DB's internal tables

Answer 1

The simpliest way will be to use one single select:

SELECT COL1,COL2,COL3 
  FROM SAMPLE_TABLE2 
 WHERE COL1 IN ((SELECT SINGLE_COLUMN FROM SAMPLE_TABLE1 WHERE SOME_FILTER))

or

SELECT s2.COL1,s2.COL2,s2.COL3 
  FROM SAMPLE_TABLE1 s1
  JOIN SAMPLE_TABLE2 s2
    ON s2.COL1 = s1.SINGLE_COLUMN
 WHERE s1.SOME_FILTER