SQL script help please - creating 'batches' of rows in a table

Question

I have a table, ADAM_TEST1, that contains just 1 column - AMOUNT:
SQL> desc adam_test1;
Name Null? Type
AMOUNT NUMBER(12)
..I have 5000 rows in this table.
I need to insert rows into another table, ADAM_TEST, which contains these values but also assign each item a unique item_number and a batch_id for every 1000 rows.
SQL> desc adam_test;
Name Null? Type
BATCH_ID NUMBER(4)
ITEM_NUMBER NUMBER(4)
AMOUNT NUMBER(4)
e.g. BATCH_ID 1 will contain 1000 rows with the amounts from ADAM_TEST1 with item_numbers of 1-1000, then BATCH_ID 2 with the next 1000 rows with item numbers 1-1000 etc ...
I can populate the table with 1 batch_id and use a sequence to number them all but I'm having problems splitting them into their batches and resetting the sequence after each batch_id increment.
Some help here would be great!
Thanks,
Adam

Answer 1

technoarcanum wrote:
Here's another way of doing it in a single SQL statement.
Run this and you'll see I've batched my test data up into batches of 10:
insert into test_109 select col_1
,row_number() over (order by col_1)
,ceil(row_number() over (order by col_1)/10)
from test_108;
select * from test_109;Unfortunately that doesn't reset the item number for each batch..
SQL> ed
Wrote file afiedt.buf
  1  select empno
  2        ,row_number() over (order by empno)
  3        ,ceil(row_number() over (order by empno)/10)
  4* from emp
SQL> /
     EMPNO ROW_NUMBER()OVER(ORDERBYEMPNO) CEIL(ROW_NUMBER()OVER(ORDERBYEMPNO)/10)
      7369                              1                                       1
      7499                              2                                       1
      7521                              3                                       1
      7566                              4                                       1
      7654                              5                                       1
      7698                              6                                       1
      7782                              7                                       1
      7788                              8                                       1
      7839                              9                                       1
      7844                             10                                       1
      7876                             11                                       2
      7900                             12                                       2
      7902                             13                                       2
      7934                             14                                       2
14 rows selected.
SQL>Instead you need to MOD it...
SQL> ed
Wrote file afiedt.buf
  1  select empno
  2        ,mod(row_number() over (order by empno)-1,10)+1
  3        ,ceil(row_number() over (order by empno)/10)
  4* from emp
SQL> /
     EMPNO MOD(ROW_NUMBER()OVER(ORDERBYEMPNO)-1,10)+1 CEIL(ROW_NUMBER()OVER(ORDERBYEMPNO)/10)
      7369                                          1                                       1
      7499                                          2                                       1
      7521                                          3                                       1
      7566                                          4                                       1
      7654                                          5                                       1
      7698                                          6                                       1
      7782                                          7                                       1
      7788                                          8                                       1
      7839                                          9                                       1
      7844                                         10                                       1
      7876                                          1                                       2
      7900                                          2                                       2
      7902                                          3                                       2
      7934                                          4                                       2
14 rows selected.
SQL>