SQL Loader and Batch ID

Question

Hi All,
In our application, we are allowing user to upload data using excel sheet in UI.
We are using PHP script in UI and using SQL Loader to load data from excel sheet to temp_table.
The temp_table has a primary key.
Here my question is , Is there any way to put some batch id for every upload in that table in automatic way ?
so that we can easily extract the data by using batch id
we are using Oracle 11g.

Answer 1

All that does is load a constant value, in which case you might as well just use constant 815 in your control file. If you want to automatically increment the value for each batch, then you need to use a different method.
Please see the example below. Prior to each data load, it loads the next value of the sequence into a separate table, then selects that value during the data load. Note that a SQL*Loader expression that uses select must be enclosed within parentheses within the double quotes.
SCOTT@orcl_11gR2> host type test1.dat
1 Prod1
2 Prod2
3 Prod3
4 Prod4
5 Prod5
SCOTT@orcl_11gR2> host type test2.dat
6 Prod6
7 Prod7
8 Prod8
SCOTT@orcl_11gR2> host type batch.ctl
options(load=1)
load data
replace
into table batch_tab
(batch_id expression "test_seq.nextval")
SCOTT@orcl_11gR2> host type data.ctl
load data
append
into table temp_table
fields terminated by whitespace
trailing nullcols
(p_id,
p_name,
batch_id expression "(select batch_id from batch_tab)")
SCOTT@orcl_11gR2> create table temp_table
  2    (p_id      number primary key,
  3     p_name    varchar2(6),
  4     batch_id  number)
  5  /
Table created.
SCOTT@orcl_11gR2> create sequence test_seq
  2  /
Sequence created.
SCOTT@orcl_11gR2> create table batch_tab
  2    (batch_id  number)
  3  /
Table created.
SCOTT@orcl_11gR2> -- first load:
SCOTT@orcl_11gR2> host sqlldr scott/tiger control=batch.ctl log=batch1.log
SQL*Loader: Release 11.2.0.1.0 - Production on Fri Apr 19 17:16:33 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.
Commit point reached - logical record count 1
SCOTT@orcl_11gR2> host sqlldr scott/tiger control=data.ctl data=test1.dat log=test1.log
SQL*Loader: Release 11.2.0.1.0 - Production on Fri Apr 19 17:16:33 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.
Commit point reached - logical record count 5
SCOTT@orcl_11gR2> select * from batch_tab
  2  /
  BATCH_ID
         1
1 row selected.
SCOTT@orcl_11gR2> select * from temp_table
  2  /
      P_ID P_NAME   BATCH_ID
         1 Prod1           1
         2 Prod2           1
         3 Prod3           1
         4 Prod4           1
         5 Prod5           1
5 rows selected.
SCOTT@orcl_11gR2> -- second load:
SCOTT@orcl_11gR2> host sqlldr scott/tiger control=batch.ctl log=batch2.log
SQL*Loader: Release 11.2.0.1.0 - Production on Fri Apr 19 17:16:33 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.
Commit point reached - logical record count 1
SCOTT@orcl_11gR2> host sqlldr scott/tiger control=data.ctl data=test2.dat log=test2.log
SQL*Loader: Release 11.2.0.1.0 - Production on Fri Apr 19 17:16:33 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.
Commit point reached - logical record count 3
SCOTT@orcl_11gR2> select * from batch_tab
  2  /
  BATCH_ID
         2
1 row selected.
SCOTT@orcl_11gR2> select * from temp_table
  2  /
      P_ID P_NAME   BATCH_ID
         1 Prod1           1
         2 Prod2           1
         3 Prod3           1
         4 Prod4           1
         5 Prod5           1
         6 Prod6           2
         7 Prod7           2
         8 Prod8           2
8 rows selected.