oracle调整表中列顺序

时间:2023-03-09 02:17:54
oracle调整表中列顺序

有一个哥们提出一个问题:

有个表,创建时候的列顺序是a,b,c

如何使用select * 的时候,让列的显示顺序是a,c,b 而且任性地必须使用select *来查询,且不能重建表。

假设有个表test

SQL> select * from test;

A                    B                    C
-------------------- -------------------- --------------------
you pig are SQL> select a,c,b from test; A C B
-------------------- -------------------- --------------------
you are pig SQL>

按照其要求,应该是以下显示方式:

SQL> select * from test;

A                    C                    B
-------------------- -------------------- --------------------
you are pig SQL>

可以通过修改sys.col$表来改变表中列的顺序

SQL> SELECT owner,object_name,object_id FROM ALL_OBJECTS WHERE OBJECT_NAME='TEST';

OWNER                          OBJECT_NAME                     OBJECT_ID
------------------------------ ------------------------------ ----------
SYS TEST 88842 SQL> select obj#,col#,name from sys.col$ where obj# =88842 order by col#; OBJ# COL# NAME
---------- ---------- ------------------------------
88842 1 A
88842 2 B
88842 3 C SQL> update sys.col$ set col#=2 where obj# =88842 and name='C'; 1 row updated. SQL> update sys.col$ set col#=3 where obj# =88842 and name='B'; 1 row updated. SQL> commit; Commit complete. SQL> select * from test; A C B
-------------------- -------------------- --------------------
you are pig SQL>

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