oracle sqlplus中column格式化命令之heading用法

SQL> create table t_sqlplus(a int,b int);

Table created.

--格式化a列为列宽4且标题为a_heading
SQL> column a for 9999 heading 'a_heading'
SQL> column b for 9999 heading 'b_heading'

--插入数据方可看到column格式化效果
SQL> insert into t_sqlplus values(1,1);

1 row created.

SQL> commit;

Commit complete.
--显示a,b列为a_heading and b_heading
SQL> select a,b from t_sqlplus;

a_heading b_heading
--------- ---------
        1         1
--如重命名a,b列
SQL> select a as a_new,b as b_new from t_sqlplus;

     A_NEW      B_NEW
---------- ----------
         1          1
---可对重命名用column格式化
SQL> column a_new for 9999 heading 'a_heading'
SQL> column b_new for 9999 heading 'b_heading'
SQL> select a as a_new,b as b_new from t_sqlplus;
--依旧可以达到上述的效果
a_heading b_heading
--------- ---------
        1         1

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