查詢而且導出數據表結構

sql語句:sql table_name :要查詢的數據表3d SELECT t.colUMN_NAME as "字段名", t.DATA_TYPE || '(' || t.DATA_LENGTH || ')' as "數據類型", t1.COMMENTS as "字段說明" FROM User_Tab_Cols t, User_Col_Comments t1 WHERE
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