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  • Oracle trigger Demo

      CREATE TABLE "figo"."AAA_LOG"
       ( "AAA_NO" NUMBER(*,0),
     "LOGS" VARCHAR2(4000 BYTE),
     "LOG_DT" DATE
       ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
      STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
      PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
      TABLESPACE "USERS" ;
     


      CREATE TABLE "figo"."AAA"
       ( "AAA_NO" NUMBER(*,0),
     "COMMENTS" VARCHAR2(400 BYTE)
       ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
      STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
      PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
      TABLESPACE "USERS" ;
     
       COMMENT ON COLUMN "figo"."AAA"."AAA_NO" IS 'AAA_NO just for trigger test';
     
       COMMENT ON TABLE "figo"."AAA"  IS 'just for trigger test';
     
      CREATE OR REPLACE TRIGGER "figo"."FF_TRIGGER_AAA"
    before INSERT ON AAA
    referencing old as old_value
    new as new_value
    for each row
     WHEN (new_value.AAA_no>100) DECLARE v_comment VARCHAR2(4000 BYTE);v_no number;
    BEGIN
           v_comment := 'AAA_no is big, comment as:' || :new_value.comments;
           v_no := :new_value.AAA_NO + 1000;
           insert into AAA_log(AAA_NO,LOGS,LOG_DT) VALUES(v_no,v_comment,sysdate);
    END;

    /
    ALTER TRIGGER "figo"."FF_TRIGGER_AAA" ENABLE;
     

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  • 原文地址:https://www.cnblogs.com/feishunji/p/2128344.html
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