查询Oracle的数据字段与注释

查看字段：

select * from user_tab_columns where Table_Name='用户表';select * from all_tab_columns where Table_Name='用户表';select * from dba_tab_columns where Table_Name='用户表';user_tab_columns：table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等all_tab_columns ：ower,table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等dba_tab_columns：ower,table_name,column_name,data_type,data_length,data_precision,data_scale,nullable,column_id等

获取表注释

select * from user_tab_commentsuser_tab_comments：table_name,table_type,comments相应的还有dba_tab_comments，all_tab_comments，这两个比user_tab_comments多了ower列。获取字段注释：select * from user_col_commentsuser_col_comments：table_name,column_name,comments相应的还有dba_col_comments，all_col_comments，这两个比user_col_comments多了ower列。