Enable/Disable Constraints In an Oracle Database

Triggers
alter trigger <TGR_NAME> disable;
alter trigger <TGR_NAME> enable;

Primary Key
alter table <TABLE_NAME> disable  PRIMARY KEY;
alter table <TABLE_NAME> disable  CONSTRAINT <PK_NAME>;

alter table <TABLE_NAME> enable PRIMARY KEY;
alter table <TABLE_NAME> enable CONSTRAINT <PK_NAME>;


Foreign Key
alter table <TABLE_NAME> disable CONSTRAINT <FK_NAME>;
alter table <TABLE_NAME> enable CONSTRAINT <FK_NAME>;