Oracle导出数据字典脚本

1.导出全部表

SELECT COL.TABLE_NAME AS "表名", 
       TT.COMMENTS AS "表描述",
       COL.COLUMN_NAME AS "字段名",            
       DECODE(COL.CHAR_LENGTH,0,DECODE(COL.DATA_SCALE,NULL,COL.DATA_TYPE,COL.DATA_TYPE||'('||COL.DATA_PRECISION||','||COL.DATA_SCALE||')'),
 COL.DATA_TYPE||'('||COL.CHAR_LENGTH||')') AS "字段类型",
       COL.DATA_DEFAULT AS "默认值",       
       COL.NULLABLE AS "是否可为空",
       CCOM.COMMENTS    AS "字段描述"
  FROM USER_TAB_COLUMNS COL,
       USER_COL_COMMENTS CCOM,
       (SELECT AA.TABLE_NAME,
               AA.INDEX_NAME,
               AA.COLUMN_NAME,
               AA.COLUMN_POSITION
          FROM USER_IND_COLUMNS AA, USER_CONSTRAINTS BB
         WHERE BB.CONSTRAINT_TYPE = 'P'
           AND AA.TABLE_NAME = BB.TABLE_NAME
           AND AA.INDEX_NAME = BB.CONSTRAINT_NAME
        ) PKCOL,
       USER_TAB_COMMENTS TT
 WHERE COL.TABLE_NAME = CCOM.TABLE_NAME
   AND COL.COLUMN_NAME = CCOM.COLUMN_NAME
   AND COL.TABLE_NAME = TT.TABLE_NAME(+)
   AND COL.COLUMN_NAME = PKCOL.COLUMN_NAME(+)
   AND COL.TABLE_NAME = PKCOL.TABLE_NAME(+)
 ORDER BY COL.TABLE_NAME,col.column_id

2.导出指定表数据字典

 SELECT  
 A.TABLE_NAME AS "表名",
 A.COLUMN_NAME AS "字段名",
 DECODE(A.CHAR_LENGTH,0,DECODE(A.DATA_SCALE,NULL,A.DATA_TYPE,A.DATA_TYPE||'('||A.DATA_PRECISION||','||A.DATA_SCALE||')'),
 A.DATA_TYPE||'('||A.CHAR_LENGTH||')') as "字段类型",
 A.DATA_DEFAULT AS "默认值",
 A.NULLABLE AS "能否为空",
 B.comments AS "备注"
FROM sys.user_tab_columns A,sys.user_col_comments B
WHERE A.table_name=B.table_name  AND A.COLUMN_NAME=B.COLUMN_NAME AND
A.TABLE_NAME IN (
'TB_SUBJECT', 'TB_SUBJECT_BALANCE', 'TB_VOUCHER', 'TB_VOUCHER_DETAILS', 
'TB_CUSTOMER', 'TB_VOUCHER_CLASSIFY_MODE', 'TB_VOUCHER_TYPE', 'TB_ASSET', 
'TB_ASSET_CATALOG', 'TB_M_DM_ASSETS_LIABI_RPT', 'TB_M_DM_PROFIT_RPT', 
'TB_M_DM_REVENUE_RPT', 'TB_M_DM_COST_RPT'
)
ORDER BY A.TABLE_NAME

 参考链接

https://blog.csdn.net/tanguang_honesty/article/details/19482579