FK constraint creation sample (Oracle)

gistfile1.txt

CREATE TABLE "TESTTABLEPARENT"
  (
    "A" VARCHAR2(20 BYTE) NOT NULL ENABLE,
    "B" VARCHAR2(20 BYTE) NOT NULL ENABLE,
    "C" DATE,
    CONSTRAINT "TESTTABLEPARENT_PK" PRIMARY KEY ("A", "B") 
  )
CREATE TABLE "TESTTABLEENFANT"
  (
    "INFO_BLABLA" VARCHAR2(20 BYTE),
    "FK_A"        VARCHAR2(20 BYTE),
    "FK_B"        VARCHAR2(20 BYTE),
    CONSTRAINT "FKC_TESTTABLEPARENT" FOREIGN KEY ("FK_A", "FK_B") REFERENCES TESTTABLEPARENT" ("A", "B") ENABLE
  )

// Or creating the constraint afterwards from ...ENFANT to ...PARENT
alter table "TESTTABLEENFANT" add constraint FKC_TESTTABLEPARENT foreign key("FK_A","FK_B") references "TESTTABLEPARENT"("A","B")