isql [-b] [-e] [-F] [-p] [-n] [-v] [-X] [-Y] [-Q]
    [-a display_charset]
    [-A packet_size]
    [-c cmdend]
    [-D database]
    [-E editor]
    [-h headers]
    [-H hostname]
    [-i inputfile]
    [-I interfaces_file]
    [-J client_charset]
    [-K keytab_file]
    [-l login_timeout]
    [-m errorlevel]
    [-o outputfile]
    [-P password]
    [-R remote_server_principal]
    [-s colseparator]
    [-S server_name]
    [-t timeout]
    -U username
    [-V [security_options]]
    [-w columnwidth]  <<=== this one
    [-z locale_name]
    [-Z security_mechanism]

C:\>isql -S SQLDEV -U test -P test -w20
1> select 'the quick brown fox', 'jumps over the lazy dog'
2> go


 -------------------
         -----------------------
 the quick brown fox
         jumps over the lazy dog

(1 row affected)
1>exit


C:\>isql -S SQLDEV -U test -P test -w100
1> select 'the quick brown fox', 'jumps over the lazy dog'
2> go

 ------------------- -----------------------
 the quick brown fox jumps over the lazy dog

(1 row affected)
1>