1.先删除主键

alter table T_SF_SUPPLIER drop constraint PK_T_SF_SUPPLIER;
2.增加主键?

alter table T_SF_SUPPLIER
? add constraint PK_T_SF_SUPPLIER primary key (sp_id)
? using index
? tablespace SYSTEM
? pctfree 10
? initrans 2
? maxtrans 255
? storage
? (
??? initial 64K
??? minextents 1
??? maxextents unlimited
? );