oracle中，1.如果表已经装载了大量数据应该是用视图来代替最好。alter table TableNM add NewField varchar2(10)rename TableNM to TableNMXcreate or replace view TableNM as  select Field1,Field2,NewField ,Field3 from TableNMX2.不是很大的数据，可以alter table TableNM rename column Field3 to NewField alter table TableNM add Field3 .....此方法涉及到Field3 ,NewField 的数据类型，数据字段间转移3.小的数据量，倒可以考虑drop 再create

示例：

alter table INV_SALESSETTLEMENTDETAIL add

(

realTimeQuantityKg number(13,2) default '0',

realTimeQuantityLiter number(13,2) default '0'

)

;

create table INV_SALESSETTLEMENTDETAIL1 as

select

"SALESDETAILGID",

"SETTLEMENTGID",

"OILARCHGID",

"ARCHNAME",

"ARCHSPEC",

"SALESTIME",

"LOADINGBILLGID",

"DENSITY",

"TINGID",

"SITENO",

"OUTAMOUNTKG",

"OUTAMOUNTLITER",

realTimeQuantityKg,

realTimeQuantityLiter,

"TAXRATE",

"SETTLEMENTPRICEKGTAX",

"BUSINESSMARK",

"SETTLEMENTPRICEKG",

"SETTLEMENTPRICELITERTAX",

"SETTLEMENTPRICELITER",

"OTHERMONEYAMOUNT",

"PAYMENTAMOUNT",

"REMARK",

"CREATETIME",

"CREATOR"

from

"TRANSPORTOIL"."INV_SALESSETTLEMENTDETAIL"

;

drop table INV_SALESSETTLEMENTDETAIL;

rename INV_SALESSETTLEMENTDETAIL1 to INV_SALESSETTLEMENTDETAIL;