将oracle的create语句更改为alter语句使用

看PD中,双击某个表,查看其preview标签,然后会发现有某个表的create语句,如下:

代码如下:

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) 
);

我们如果加了某些字段,又要在原数据库上加上这些字段,我们可以这样:把create变为alter,然后将不要的
字段去除,如下所示:

代码如下:

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) 
) 

这样就加快了我们的开发效率.

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