1、创建两张测试表,
create table test_col1(factory_id int, factory_name varchar2(20));
create table test_col2(factory_id int, factory_name varchar2(20));
2、查看test_col1的表结构,select * from user_tab_cols t where table_name = 'TEST_COL1',有两个字段,
3、查看test_col2的表结构,select * from user_tab_cols t where table_name = 'TEST_COL2',同样有两个字段,
4、查看factory_id、factory_name字段存在的所有表中记录情况,select * from user_tab_cols t where column_name in ('FACTORY_ID','FACTORY_NAME'),