SELECT USER_TAB_COLS.TABLE_NAME as 表名,
USER_TAB_COLS.COLUMN_NAME as 列名 ,
USER_TAB_COLS.DATA_TYPE as 数据类型,
USER_TAB_COLS.DATA_LENGTH as 长度,
USER_TAB_COLS.NULLABLE as 是否为空,
USER_TAB_COLS.COLUMN_ID as 列序号,
user_col_comments.comments as 备注
FROM USER_TAB_COLS
inner join user_col_comments on
user_col_comments.TABLE_NAME=USER_TAB_COLS.TABLE_NAME
and user_col_comments.COLUMN_NAME=USER_TAB_COLS.COLUMN_NAME
where USER_TAB_COLS.Table_Name='表名'