oracle 如何匯出資料字典

-- 查詢某錶的資料字典

select a.table_name as "表名",a.column_name as "欄位名",

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 "字段型別1",a.data_type as "字段型別",a.data_precision as "有效位",a.data_scale as "精度值",

a.char_length as "字段長度",a.nullable as "能否為空"

from sys.user_tab_columns a where a.table_name = 'tam_address'

-- 具有dba許可權使用者匯出資料字典

select a.table_name as "表名",a.column_name as "欄位名",

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 "字段型別",a.data_default as "預設值",

a.nullable as "能否為空",b.comments as "備註"

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

--一般使用者匯出該使用者下的資料字典

select a.table_name as "表名",a.column_name as "欄位名",

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 "字段型別",a.data_default as "預設值",

a.nullable as "能否為空",b.comments as "備註"

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