How to generate 2 range Parallelly? - database

Question

I want to generate incremental numbers from given range and insert into table. Below is screenshot of my temp table in which both the two range are available.
as you see in above screenshot I have two range. Now what I want that I want to create range with incremental number for both the range and insert into two column in another table with one to one mapping.
From below code I am successfully generating one range from two columns.
FOR i IN (SELECT TO_NUMBER(column_value) range_value FROM XMLTABLE(lc_frm_srl || ' to ' || lc_to_srl))
LOOP
insert into SML.temp_mtr_cca( MTR_SRL_NO)
values(lc_prefix || i.range_value);
END LOOP;
commit;
e.g. expected result.
X1673740 - XF179320
X1673741 - XF179321
X1673742 - XF179322

Answer 1

Your code cannot work with 'X1673740' to 'X1673760', because these are strings, but you need numbers that must not start with an 'X': '1673740' to '1673760'.
So, I assume your temp table actually contains these numbers instead of strings starting with 'X'. We can later add the 'X', once we generated the numbers (which you seem to be doing in your query already). Same for the 'XF' of your second number range.
One thing to note: The ending_modem_srl column is of no interest here, because the ranges must have the same length anyway to have this working, so let's use the length of starting_mtr_srl to ending_mtr_srl.
Once we have the mtr numbers, we can easily get the modem numbers, because modem_srl_no = mtr_srl_no + starting_modem_srl - starting_mtr_srl, e.g. 79322 = 1673742 + 79320 - 1673740.
INSERT INTO sml.temp_mtr_cca(mtr_srl_no, modem_srl_no)
SELECT
'X' + TO_CHAR(XMLCAST(column_value AS NUMBER)),
'XF' + TO_CHAR(XMLCAST(column_value AS NUMBER) + t.starting_modem_srl - t.starting_mtr_srl)
FROM temp_table t
CROSS APPLY XMLTABLE(starting_mtr_srl || ' to ' || ending_mtr_srl);
COMMIT;

Answer 2

you need to have an equal range value for this solution. I hope this sample code be helpful.
DECLARE
first_series_prefix VARCHAR2(50);
first_series_start NUMBER;
second_series_start NUMBER;
second_series_prefix VARCHAR2(50);
range_value NUMBER;
BEGIN
first_series_prefix := 'X';
first_series_start := 1673740;
second_series_start := 179320;
second_series_prefix := 'XF';
range_value := 20;
INSERT INTO temp_mtr_cca ( combined_serials )
SELECT
first_series_prefix
|| first_series.first_serials
|| ' - '
|| second_series_prefix
|| second_series.second_serials final_result
FROM (
SELECT
ROWNUM rwn,
a first_serials
FROM (
SELECT
first_series_start + level - 1 a
FROM
dual
CONNECT BY
level <= range_value
)
) first_series
LEFT OUTER JOIN (
SELECT
ROWNUM rwn,
a second_serials
FROM (
SELECT
second_series_start + level - 1 a
FROM
dual
CONNECT BY
level <= range_value
)
) second_series ON first_series.rwn = second_series.rwn;
END;