该信息存储在ALL_TAB_COLUMNS系统表中:

SQL> select column_name from all_tab_columns where table_name = 'DUAL';

DUMMY

或者你可以描述表，如果你使用SQL*PLUS:

SQL> desc dual
Name                               Null?    Type
----------------------------------------------------- -------- ---------------------- -------------
DUMMY                               VARCHAR2(1)

SELECT A.COLUMN_NAME, A.* FROM all_tab_columns a 
WHERE table_name = 'Your Table Name'
AND A.COLUMN_NAME = 'COLUMN NAME' AND a.owner = 'Schema'

您可以查询USER_TAB_COLUMNS表以获取表列元数据。

SELECT table_name, column_name, data_type, data_length
FROM USER_TAB_COLUMNS
WHERE table_name = 'MYTABLE'

这也是我们可以使用它的一种方式

select * from product where 1 != 1

对甲骨文

SELECT column_name FROM user_tab_cols WHERE table_name=UPPER('tableName');

SELECT COLUMN_NAME 
FROM YourDatabase.INFORMATION_SCHEMA.COLUMNS 
WHERE TABLE_NAME = 'YourTableName'