看PD中，雙擊某個(gè)表，查看其preview標(biāo)簽，然后會(huì)發(fā)現(xiàn)有某個(gè)表的create語(yǔ)句，如下：
復(fù)制代碼 代碼如下:
create table Company_Info (
Company_ID NVARCHAR2(50) not null,
Area_ID NVARCHAR2(50),
Mem_ID NVARCHAR2(50),
Level_Id NVARCHAR2(50),
Name NVARCHAR2(50) not null,
Capital NVARCHAR2(50),
Unit_Property NUMBER(2) not null,
Economics_type NUMBER(2) not null,
Man_Scale NUMBER(10,0),
License_Code NVARCHAR2(50),
License_Img NVARCHAR2(50),
Intro NVARCHAR2(3000),
Company_Img NVARCHAR2(200),
Address NVARCHAR2(200),
Postal_Code NVARCHAR2(50),
Tel NVARCHAR2(50),
Fax NVARCHAR2(50),
Mobile NVARCHAR2(50) not null,
Email NVARCHAR2(50) not null,
Contactor_sex NUMBER(2),
Contactor NVARCHAR2(50),
Web_Site NVARCHAR2(200),
View_Count NUMBER(20,0),
Create_Date DATE not null,
Update_Date DATE not null,
Status NUMBER(2),
Company_Type NUMBER(2),
Remain_Point NUMBER(6,0),
Cmp_Level NVARCHAR2(50),
isAdv NUMBER(2),
Expri_Date DATE,
Display_index NUMBER(6,0),
constraint PK_COMPANY_INFO primary key (Company_ID)
);
我們?nèi)绻恿四承┳侄危忠谠瓟?shù)據(jù)庫(kù)上加上這些字段，我們可以這樣：把create變?yōu)閍lter，然后將不要的
字段去除，如下所示：
復(fù)制代碼 代碼如下:
alter table Company_Info add(
Remain_Point NUMBER(6,0),
Cmp_Level NVARCHAR2(50),
isAdv NUMBER(2),
Expri_Date DATE,
Display_index NUMBER(6,0)
)
這樣就加快了我們的開發(fā)效率.
