How to remove blank spaces from SQL*Plus query?

问题

My query below being called from sqlplus is returning lot of spaces in the end of each value, how can I remove it?

See example below: * I substituted the values with x

x            ,x                                                                                                                          
                                                                                                           ,x                             ,x                          ,x,x
x

My query is:

set linesize 1000
set trimspool on
set trimout on
set pagesize 0
set colsep ,
set feedback off

spool /result.csv

SELECT process_id,
  x1,
  x2,
  x3,
  x4,
  x5,
  x6,
  x
FROM x
WHERE x IN ('x');

回答1:

The simplest way is to concatenate the columns with the commas in between, rather than using colsep:

select process_id
    ||','|| x1
    ||','|| x2
...

Note that you only have the comma in the concatenation strong, not between the columns. You end up with a single column in the reult.

来源：https://stackoverflow.com/questions/17390755/how-to-remove-blank-spaces-from-sqlplus-query