Update sur deux tables

Bonjour,
j'ai deux tables lie par comment peut on executer un update en meme temps sur les deux tables si je change mon Ra_Numero au niveau de ma table rapprochement

ma premiere table :

Code:

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CREATE TABLE "DEV"."RAPPROCHEMENT"
  (
 "RA_NUMERO"  VARCHAR2(6 BYTE) NOT NULL ENABLE,
    "RA_NOM"     VARCHAR2(30 BYTE),
    "RA_MOTDIR"  VARCHAR2(20 BYTE),
    "RA_OBSPREV" VARCHAR2(450 BYTE),
    "LD_CODE"    VARCHAR2(2 BYTE),
    "C1_CODE"    VARCHAR2(2 BYTE),
    "C2_CODE"    VARCHAR2(2 BYTE),
    CONSTRAINT "PK_RAPPROCHEMENT" PRIMARY KEY ("RA_NUMERO") USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 NOLOGGING COMPUTE STATISTICS STORAGE(INITIAL 131072 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "D_AEDV" ENABLE,
    CONSTRAINT "FK_RAPPROCH_A_POUR_LIEU_DIST" FOREIGN KEY ("LD_CODE") REFERENCES "DEV"."LIEU_DISTIL" ("LD_CODE") ENABLE,
    CONSTRAINT "FK_RAPPROCH_A_POUR_CRITERE1" FOREIGN KEY ("C1_CODE") REFERENCES "DEV"."CRITERE1" ("C1_CODE") ENABLE,
    CONSTRAINT "FK_RAPPROCH_A_POUR_CRITERE2" FOREIGN KEY ("C2_CODE") REFERENCES "DEV"."CRITERE2" ("C2_CODE") ENABLE
  )

ma deuxieme table :

Code:

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CREATE TABLE "DEV"."SURFACE_RAPPRO"
  (
    "SR_ID"            NUMBER(*,0) NOT NULL ENABLE,
    "RA_NUMERO"        VARCHAR2(32 BYTE) NOT NULL ENABLE,
    "SR_ANNEECAMPAGNE" NUMBER(4,0) NOT NULL ENABLE,
    "SR_DATECREATION" DATE NOT NULL ENABLE,
    "SR_DATEMAJ" DATE,
    "SR_TOTALSAU"       NUMBER(7,4),
    "SR_TOTAUTRECEPAGE" NUMBER(7,4),
    "SR_TOTAUTRECULT"   NUMBER(7,4),
    CONSTRAINT "SURFACE_RAPPRO_PK" PRIMARY KEY ("SR_ID") USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "D_AEDV" ENABLE,
    CONSTRAINT "SURFACE_RAPPRO_RAPPR_FK1" FOREIGN KEY ("RA_NUMERO") REFERENCES "DEV"."RAPPROCHEMENT" ("RA_NUMERO") ENABLE
  )

Cordialement,