Applying Sql operator in Sql loader

Question

Hi I have a table sql_ldr with four columns
create table slq_ldr(a number,b number,c number,d number)
I have to load the .csv file with the following values
1,12,123
2,23,234
3,34,345
4,45,456
I want to populate the column d by concatenating a,b and c
so the table to populated as below
a b c d
1 12 123 112123
2 23 234 223234
3 34 345 334345
4 45 456 445456
I tried with using the concat function
==================
LOAD DATA
infile 'sql_ldr.csv'
INTO TABLE sql_ldr
APPEND
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY ' '
TRAILING NULLCOLS
a integer external
,b integer external
,c integer external
,d integer external "CONCAT(:a,:b,:c)"
I am getting the error
Table SQL_LDR, loaded from every logical record.
Insert option in effect for this table: APPEND
TRAILING NULLCOLS option in effect
Column Name Position Len Term Encl Datatype
A FIRST * , O( ) CHARACTER
B NEXT * , O( ) CHARACTER
C NEXT * , O( ) CHARACTER
D NEXT * , O( ) CHARACTER
SQL string for column : "CONCAT(:a, :b, :c)"
Record 1: Rejected - Error on table SQL_LDR, column D.
ORA-00909: invalid number of arguments
the same error for all records
What is the way to do it.?
Thanks
ARI

Answer 1

CONCAT accepts only two arguments. So the control file becomes:
LOAD DATA
infile 'sql_ldr.csv'
INTO TABLE sql_ldr
APPEND
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY ' '
TRAILING NULLCOLS
a integer external
,b integer external
,c integer external
,d integer external "CONCAT(:a,CONCAT(:b,:c))"
A second solution would be to use a trigger on the table to populate the value for column d rather than handling it in the SQL Loader control file spec.
HTH! Sue