Picking the first 25 characters in SQL
The column in database is a varchar(25). But sometimes my datafile has data for this column exceeding 25. I want the SQLloader to take the first 25 characters and load them into the database. I am using a control file, variable-length delimited by |, so I can not mention positions for all the fields, this field represents 40th column in database (total 50 columns). Is there any way to specify to pick the first 25 characters?
Yes. You can do this. The way to accomplish this task
is to apply an SQL operator to your field. To use just
the first 25 characters, you will want to use the
SUBSTR function on the input data. Something similar
to the following can help:
APPEND INTO TABLE XXX
( LAST position(1:7) char "UPPER(:LAST)"
FIRST position(8:45) char
The above is just a portion of what you control file
might look like. I've foced the data that will go into
the LAST column to be all upper case and I've forced
the data to be placed into the FIRST column to be just
the first 25 characters of the data.
This was first published in September 2003