Retrieve values with a unique constraint

All,

It may be a stupid request and I think too speak of it. But, for some reason, I am unable to write a query to accomplish my task.

I have the T table with some columns and the columns c1, c2, c3 are part of a composite unique constraint. Now I'm updating the value c3 from 52 to 51. But, when I do an update like:

Update T set c3 = 51 where c3 = 52;

I get a Unique constraint violation error.

So, I need to know what are the values of repetition that might be causing this?

Thanks in advance guys.

34a22dde-3108-4F05-BE72-eb1043d28314 wrote:

All,

It may be a stupid request and I think too speak of it. But, for some reason, I am unable to write a query to accomplish my task.

I have the T table with some columns and the columns c1, c2, c3 are part of a composite unique constraint. Now I'm updating the value c3 from 52 to 51. But, when I do an update like:

Update T set c3 = 51 where c3 = 52;

I get a Unique constraint violation error.

So, I need to know what are the values of repetition that might be causing this?

Thanks in advance guys.

An inelegant way...

select *
from your_table tab1
where (tab1.c1,tab1.c2) in
(
select tab2.c1, tab2.c2
from your_table tab2
where tab2.c3 = 52
)
where tab1.c3 = 51;

Tags: Database

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                         ELSE
                                SELECT KI_CODE INTO V_KI_CODE_DB_STATSZ FROM FHM_KEY_INDICATOR_D WHERE POD_NAME=V_PODNAME AND KI_NAME='DB_STATS';
                                 DBMS_OUTPUT.PUT_LINE('V_KI_CODE_DB_STATSZ :'||V_KI_CODE_DB_STATSZ);
                                 INSERT INTO FHM_DASHBOARD_F(PODNAME,DASH_DATE,KI_CODE,KI_VALUE,KI_STATUS) VALUES(V_PODNAME,TRUNC(SYSDATE-1),V_KI_CODE_DB_STATSZ,0,0); 
                                 COMMIT; 
                                 
                         END IF;
                        
     EXCEPTION
                        WHEN OTHERS THEN
                        V_ERRORSTRING :='INSERT INTO FHM_DASHBOARD_F_ERROR_LOG(POD_NAME,KI_NAME,ERRORNO,ERRORMESSAGE,DATETIME) VALUES
               ('''||V_PODNAME||''',''DB_STATS'','''||SQLCODE||''','''||SQLERRM||''',SYSDATE)';                         
               EXECUTE IMMEDIATE  V_ERRORSTRING;
                        COMMIT;
          END;

      --END LOOP;
  --CLOSE PODNAME_CUR;


END;


END FHM_DASHBOARD_PROC;
    and the table where data integration is
    CREATE TABLE "CRMODDEV"."FHM_DASHBOARD_F"
  (
    "PODNAME" VARCHAR2(25 BYTE) NOT NULL ENABLE,
    "DASH_DATE" DATE,
    "KI_CODE"   NUMBER NOT NULL ENABLE,
    "KI_VALUE"  NUMBER,
    "KI_STATUS" NUMBER,
    CONSTRAINT "FHM_DASHBOARD_F_DATE_PK" PRIMARY KEY ("DASH_DATE", "PODNAME", "KI_CODE") USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 NOLOGGING COMPUTE STATISTICS STORAGE(INITIAL 4194304 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "CRMODDEV_IDX" ENABLE,
    CONSTRAINT "FHM_DASHBOARD_F_KI_CODE_FK" FOREIGN KEY ("KI_CODE") REFERENCES "CRMODDEV"."FHM_KEY_INDICATOR_D" ("KI_CODE") ENABLE
  )
  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS NOLOGGING STORAGE
  (
    INITIAL 3145728 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT
  )
  TABLESPACE "CRMODDEV_TBL" ENABLE ROW MOVEMENT ;
    the constraint primary key is FHM_DASHBOARD_F_DATE_PK and is on 3 columns of the table, DASH_DATE, PODNAME, KI_CODE



    And it's the query used in the procedure to insert the data into the table
    (SELECT  PODNAME, DASH_DATE AS CU_DATE, KI.KI_CODE, NVL(PF.KI_VALUE,0), 
                               CASE
                               WHEN PF.KI_VALUE = ki.warning_threshold then 2
when PF.KI_VALUE=0 then 0
ELSE 1 
END  AS ALERT_STATUS
From 
(Select  Podname,Db_Date As Dash_Date,Decode(A.Stats_Last_Status,'SUCCEEDED',1,'FAILED',2,'STOPPED',2,Null,0) Ki_Value From  -- Added Distinct
FHM_DB_METRICS_F a,fhm_db_d b where a.dbname=b.dbname and podname in ('XYZ') and db_date = TRUNC(SYSDATE-2) and dbtype='OLTP')PF,
Fhm_Key_Indicator_D Ki Where Pf.Podname=Ki.Pod_Name And Ki.Tier_Code=3 And Ki.Ki_Name='DB_STATS'
And (Pf.Podname,Trunc(Pf.Dash_Date),Ki.Ki_Code) Not In (Select Podname,Dash_Date,Ki_Code From Fhm_Dashboard_F));
    It gives * record * 2 suite
    ---------------------------------------
    XYZ JANUARY 20 12 2521 1 1
    XYZ JANUARY 20 12 2521 1 1

    It gives the Unique constraint violation error when inserting. Then, I changed in the above insertion code by adding a distinct clause. Once the query gives only a SINGLE record accordingly. However, this record is not be inserted into the table and give the same error.

    Now the question is how should I insert that record into the table with success?


    If the message is too long, however, I gave you the real structure of the object or procedure and error.

    Thank you in advance.

    When you have 5 columns in the game adding THAT SEPARATE is n ot solution that you can still get the same error once.

    Check the target table if the data exists before inserting... If this is not the case, check the structure of the table for a unique constraint created on other columns.

    select *from 
where
DASH_DATE=date '2012-01-20'
and PODNAME='XYZ'
and  KI_CODE=2521;

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