Syntax Rules for Commands Files 
Note the following syntax rules for
command files.General Syntax Rules when Calling the SAP DB Loader
Syntax Rules for Calling the SAP DB LoaderDelimiting Lines Between Commands
Individual commands in a command file are separated by a line, at the beginning of which there is a double forward slash //.
Comments
After a double forward slash // at the start of the line, you can enter comments. The comments are ignored by SAP DB Loader during the processing of the command file.

CREATE TABLE customer
(cno FIXED(4) CONSTRAINT cno BETWEEN 1 AND 9999 KEY,
salutn CHAR(7) CONSTRAINT salutn IN ('Mr', 'Ms', 'company'),
name CHAR(10) NOT NULL,
zip CHAR(5) CONSTRAINT SUBSTR(zip_dom,1,5) LIKE '(0-9)(0-9)(0-9)(0-9)(0-9)',
address CHAR(25) NOT NULL)
//
FASTLOAD TABLE customer
cno 1
name 2
zip 3
address 4
INFILE 'customer.data'
//create index
CREATE INDEX customer_index ON customer (name)
//
DATAEXTRACT cno, name, zip, address from customer
OUTFIELDS
cno 1
name 2
zip 3
address 4
OUTFILE 'newcustomer.data'