Question

I want to do a script that retrieves all the data in the table COURBE_CHARGE to copy them to the table with HISTORIQUE_COURBE_CHARGE measurement date (the field CCH_DATE) that is either earlier than 14 months, and that removes the copied data.

COURBE_CHARGE and HISTORIQUE_COURBE_CHARGE is the same table

COURBE_CHARGE:

Column                Data Type

CCH_ID                  NUMBER(*,0)
TLM_ID                  NUMBER(*,0)
CPT_ID                  NUMBER(*,0)
CCH_DATE                    DATE
CCH_DATE_INTEGRATION    DATE
CCH_NEW                 NUMBER(*,0)
CCH_NB_HEURES           NUMBER(*,0)
CCH_TYPE_ENERGIE            VARCHAR2(12)
P1                          NUMBER(*,0)
P2                          NUMBER(*,0)
P3                          NUMBER(*,0)
…                           NUMBER(*,0)
P149                    NUMBER(*,0)
P150                    NUMBER(*,0)
PH1                         NUMBER(*,0)
PH2                         NUMBER(*,0)
…                           NUMBER(*,0)
PH24                    NUMBER(*,0)
PH25                    NUMBER(*,0)

HISTORIQUE_COURBE_CHARGE:

Column                Data Type

HIS_CCH_ID                  NUMBER(*,0)
TLM_ID                  NUMBER(*,0)
CPT_ID                  NUMBER(*,0)
CCH_DATE                    DATE
CCH_DATE_INTEGRATION    DATE
CCH_NEW                 NUMBER(*,0)
CCH_NB_HEURES           NUMBER(*,0)
CCH_TYPE_ENERGIE            VARCHAR2(12)
P1                          NUMBER(*,0)
P2                          NUMBER(*,0)
P3                          NUMBER(*,0)
…                           NUMBER(*,0)
P149                    NUMBER(*,0)
P150                    NUMBER(*,0)
PH1                         NUMBER(*,0)
PH2                         NUMBER(*,0)
…                           NUMBER(*,0)
PH24                    NUMBER(*,0)
PH25                    NUMBER(*,0)

I have an error when i execute my script

Thanks.

Answer 1

INSERT INTO HISTORIQUE_COURBE_CHARGE (CCH_DATE, [field list]) 
    AS 
      SELECT SYSDATE, [field list] 
        FROM COURBE_CHARGE
       WHERE CH_DATE < (SYSDATE - 425);

[Field list] should be expanded to the full field list of your tables. (eg. P1, P2, P3…) without the CH_DATE

The where cond: 14 months are roughly 425 days, adjust the condition if you need exactly 14 months.

EDIT: please note that ch_date will be set to SYSDATE in historical table, that can be right or wrong, depending on situation, if you need to keep track of when archiviation has been actually done (but I suggest you to add a new date column HIST_DATE and use it to store SYSDATE). In that scenario insert will be:

ALTER TABLE HISTORIQUE_COURBE_CHARGE ( ADD HIST_DATE DATE ); — execute this only once

INSERT INTO HISTORIQUE_COURBE_CHARGE (HIST_DATE, [field list]) 
        AS 
          SELECT SYSDATE, [field list] 
            FROM COURBE_CHARGE
           WHERE ... -- whatever where cond

In this case, [field list] is the whole field list of the table. Likewise you can store other informations (such as user performing the storicization and so on).

for the deletion:

DELETE 
  FROM COURBE_CHARGE 
 WHERE CC_ID IN (SELECT HIS_CC_ID 
                   FROM HISTORIQUE_COURBE_CHARGE );

this will delete each saved row.