How do I skip footer records in Data file through control file of sql*loade

hi,
I am using sql*loader to load data from data file and i have written control file for it. How do i skip last '5' records of data file or the footer records to be skiped to read.
For first '5' records to be skiped we can use "skip" to achieve it but how do i acheive for last '5' records.
2)
Can I mention two data files in one control file if so what is the syntax(like we give INFILE Where we mention the path of data file can i mention two data file in same control file)
3)
If i have datafile with variable length (ie 1st record with 200 charcter, 2nd with 150 character and 3rd with 180 character) then how do i load data into table, i mean what will be the syntax for it in control file.
4)if i want to insert sysdate into table through control file how do i do it.
5) If i have variable length records in data file and i have first name then white space between then and then last name, how do i insert this value which includes first name and last name into single column of the table.( i mean how do you handle the white space in between first name and last name in data file)
Thanks in advance
ram

You should read the documentation about SQL*Loader.

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