如何通过sql语句比较2个表结构答:select v1.table_name,v2.table_name, v1.column_name,v2.column_name,v1.data_type,v2.data_type,v1.data_length,v2.data_length ,v1.data_precision,v2.data_precision,v1.data_scale,v2.data_scale from (select * from user_tab_columns where table_name='表1') v1 full join...