-- 查询某表的数据字典
SELECT A.TABLE_NAME AS "表名",A.COLUMN_NAME AS "字段名",
DECODE(A.CHAR_LENGTH,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1",A.DATA_TYPE AS "字段类型",A.DATA_PRECISION AS "有效位",A.DATA_SCALE AS "精度值",
A.CHAR_LENGTH AS "字段长度",A.NULLABLE AS "能否为空"
FROM sys.user_tab_columns A where A.table_name = 'TAM_ADDRESS'

-- 具有dba权限用户导出数据字典
SELECT A.TABLE_NAME AS "表名",
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.all_tab_columns A,sys.DBA_COL_COMMENTS B
WHERE A.owner=B.owner AND A.table_name=B.table_name AND A.COLUMN_NAME=B.COLUMN_NAME AND A.owner='guoqiang' 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

--一般用户导出该用户下的数据字典
SELECT A.TABLE_NAME AS "表名",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_M_DM_COST_RPT'
)

ORDER BY A.TABLE_NAME

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/guoqiang1983/archive/2008/05/21/2466742.aspx