Well....it is in the links I mentioned.
But your control file will look like this:
LOAD DATA
INFILE "C:\Users\data.txt"
APPEND
INTO TABLE table_a WHEN Grade = 'Clerk'
FIELDS TERMINATED BY '|' OPTIONALLY ENCLOSED BY '"'
TRAILING NULLCOLS
(empno postition(1), <=============
empname,
salary,
grade
)
INTO TABLE table_a WHEN Grade = 'Peon'
FIELDS TERMINATED BY '|' OPTIONALLY ENCLOSED BY '"'
TRAILING NULLCOLS
(empno postition(1), <=============
empname,
salary,
grade
)
etc etc