Oracle查看具体某张表的表结构

Oracle查看具体某张表的表结构

SELECT T1.TABLE_NAME,
       T1.COLUMN_NAME,
       T1.NULLABLE,
       T1.DATA_TYPE || '(' || T1.DATA_LENGTH || ')',
       T2.COMMENTS
  FROM all_tab_columns  T1, all_COL_COMMENTS T2
 WHERE T1.TABLE_NAME = T2.TABLE_NAME
   AND T1.COLUMN_NAME = T2.COLUMN_NAME
   AND T1.TABLE_NAME = 'OA_AD_USER';
  -- 或者(查看当前用户下)
   SELECT T1.TABLE_NAME,
       T1.COLUMN_NAME,
       T1.NULLABLE,
       T1.DATA_TYPE || '(' || T1.DATA_LENGTH || ')',
       T2.COMMENTS
  FROM USER_TAB_COLS T1, USER_COL_COMMENTS T2
 WHERE T1.TABLE_NAME = T2.TABLE_NAME
   AND T1.COLUMN_NAME = T2.COLUMN_NAME
   AND T1.TABLE_NAME = 'OA_AD_USER';