oracle sqlplus 格式化输出的命令

SQL> select * from aa;

BB CC
---------- ----------
1 999999.99

SQL> col bb format '99.9';
SQL> select * from aa;

BB CC
----- ----------
1.0 999999.99

SQL> col bb head '99.9';
SQL> select * from aa;

99.9 CC
----- ----------
1.0 999999.99

SQL> col bb head '学号';
SQL> select * from aa;

学号 CC
----- ----------
1.0 999999.99

SQL> col bb format '99';
SQL> select * from aa;

学号 CC
---- ----------
1 999999.99

SQL> col bb head '学|号';
SQL> select * from aa;

学
号 CC
--- ----------
1 999999.99

SQL> select count(bb),sum(cc) from aa;

COUNT(BB) SUM(CC)
---------- ----------
8192 8191999918

SQL> col sum(cc) format '9999999999.99';
SQL> select count(bb),sum(cc) from aa;

COUNT(BB) SUM(CC)
---------- --------------
8192 8191999918.08

SQL> col sum(cc) format '9999999999.99' head '总分';
SQL> col count(bb) format '999999' head '人数';
SQL> select count(bb),sum(cc) from aa;

人数 总分
------- --------------
8192 8191999918.08