将oracle的create语句更改为alter语句使用

createtableCompany_Info(
Company_IDNVARCHAR2(50)notnull,
Area_IDNVARCHAR2(50),
Mem_IDNVARCHAR2(50),
Level_IdNVARCHAR2(50),
NameNVARCHAR2(50)notnull,
CapitalNVARCHAR2(50),
Unit_PropertyNUMBER(2)notnull,
Economics_typeNUMBER(2)notnull,
Man_ScaleNUMBER(10,0),
License_CodeNVARCHAR2(50),
License_ImgNVARCHAR2(50),
IntroNVARCHAR2(3000),
Company_ImgNVARCHAR2(200),
AddressNVARCHAR2(200),
Postal_CodeNVARCHAR2(50),
TelNVARCHAR2(50),
FaxNVARCHAR2(50),
MobileNVARCHAR2(50)notnull,
EmailNVARCHAR2(50)notnull,
Contactor_sexNUMBER(2),
ContactorNVARCHAR2(50),
Web_SiteNVARCHAR2(200),
View_CountNUMBER(20,0),
Create_DateDATEnotnull,
Update_DateDATEnotnull,
StatusNUMBER(2),
Company_TypeNUMBER(2),
Remain_PointNUMBER(6,0),
Cmp_LevelNVARCHAR2(50),
isAdvNUMBER(2),
Expri_DateDATE,
Display_indexNUMBER(6,0),
constraintPK_COMPANY_INFOprimarykey(Company_ID)
);