oracle sql loader loading data in different columns in same table

Question

I have a sample csv file that contains data that i want to load in oracle table. The sample data is like

1,aa,b,c
2,x,yy,zzz
1,aa,b,c
2,x,yy,zzz

These are two different records distinguished by first character as '1' and '2', for which I am having a data table in db, that contains the columns of first record and then columns of second record. I tried to load the data using the 'WHEN' clause, but the problem is it don't load data sequentially. It load data for '1' first and then for '2'. like

ID  col1    col2    col3    col4    col5    col6
1   aa      b       c       null    null    null
1   aa      b       c       null    null    null
2   null    null    null    x       yy      zzz
2   null    null    null    x       yy      zzz

Here's the loader code:

load data
infile 'C:\sample.csv'
APPEND 
INTO TABLE "temp"
WHEN "ID" = '1'
fields terminated by "," optionally enclosed by '"' trailing nullcols
(
Col1,
Col2,       
Col3
)
INTO TABLE "temp"
WHEN "ID" = '2'
fields terminated by "," optionally enclosed by '"' trailing nullcols
(
Col4,
Col5,       
Col6
)

I just want to load the data as:

ID  col1    col2    col3    col4    col5    col6
1   aa      b       c       null    null    null
2   null    null    null    x       yy      zzz
1   aa      b       c       null    null    null
2   null    null    null    x       yy      zzz

Any help would be appreciated.

Answer 1

You could load it into a temporary table adding a column that is a sequence number. Then you load it into another table splitting up the columns as you want.

This is not tested but to give you a rough idea:

create or replace tmpsequence;

load data
infile 'C:\sample.csv'
APPEND 
INTO TABLE "temp"
fields terminated by "," optionally enclosed by '"' trailing nullcols
(
rec_id "tempsequence.nextval",
id,
Col1,
Col2,       
Col3
)

create table temp2
  select rec_id, id, case when id = "1" then col1 else null end
                   , case when id = "1" then col2 else null end
                   , case when id = "1" then col3 else null end
                   , case when id = "2" then col1 else null end
                   , case when id = "2" then col2 else null end
                   , case when id = "2" then col3 else null end
    from temp

Then you should be able to see what you want with

select * from temp2 order by rec_id

Answer 2

Use "CONTINUEIF" to assemble logical records from multi-line records in your data file. This tells SQL*Loader to keep going if a condition is matched. Here, it says to continue if the first position on the next line is a '2'. The control file is structured to not load the record_part number:

LOAD DATA
infile test.dat
truncate
continueif NEXT (1:1) = '2'
INTO TABLE X_test
fields terminated by ',' TRAILING NULLCOLS
(rec_part FILLER
,col1 
,col2
,col3
,col4
,col5
,col6
)

After loading:

If the data will ALWAYS be on two lines, replace this line:

continueif NEXT (1:1) = '2'

with

concatenate 2

which says each logical record is always 2 rows in the data.

Answer 3

If you are loading data through sqlloader command, then try adding the parameter rows = 1. This will force sqlloader to insert each row of data in the table thus making the file load sequential. By default the row count is 64 which is why you are not getting a sequential load for a small file .

Hope this helps..