oracle查询表中列数

1、查询表中列数

select count( column_name )
from user_tab_columns
where table_name = '表名'; --表名为大写

 或者

select count(column_name) from user_tab_columns where table_name=upper('表名');

 2、查询表中所有列名

SELECT COLUMN_NAME FROM USER_TAB_COLUMNS WHERE TABLE_NAME =upper('organization_config' )ORDER BY COLUMN_ID