primary key? 删除主键?? alter table MESEXT_RESOURCE_BINDING
? drop constraint PK_MESEXT_RESOURCE_BINDING cascade;

?

primary key? 新建主键? alter table MESEXT_RESOURCE_BINDING
? add constraint PK_MESEXT_RESOURCE_BINDING primary key (RESOURCE_NO, SITE);

?

?indexes? 删除索引?? drop?index?索引名；