问题
I have a table and in this table i have data is not properly loaded data integrity issue ,since this is a dimension table we need to maintain the effective_dt_from and effective_dt_to and version correctly ,below is the table and sample data
create table TEST
(
LOC_SID NUMBER(38,0),
CITY VARCHAR2(180 BYTE),
POSTAL_CD VARCHAR2(15 BYTE),
EFFECTIVE_DT_FROM DATE,
EFFECTIVE_DT_TO DATE,
VERSION NUMBER(38,0)
);
Insert into TEST values (81910,'chicago',null,to_date('01.01.00 00:00:00','DD.MM.YY HH24:MI:SS'),to_date('31.12.99 23:59:59','DD.MM.YY HH24:MI:SS'),1);
Insert into TEST values (81911,'chicago',null,to_date('01.01.00 00:00:00','DD.MM.YY HH24:MI:SS'),to_date('31.12.99 23:59:59','DD.MM.YY HH24:MI:SS'),1);
Insert into TEST values (81912,'chicago',null,to_date('01.01.00 00:00:00','DD.MM.YY HH24:MI:SS'),to_date('31.12.99 23:59:59','DD.MM.YY HH24:MI:SS'),1);
Insert into TEST values (81913,'chicago',null,to_date('01.01.00 00:00:00','DD.MM.YY HH24:MI:SS'),to_date('31.12.99 23:59:59','DD.MM.YY HH24:MI:SS'),1);
Insert into TEST values (81914,'chicago',null,to_date('01.01.00 00:00:00','DD.MM.YY HH24:MI:SS'),to_date('31.12.99 23:59:59','DD.MM.YY HH24:MI:SS'),1);
Data integrity check query
SELECT count(*) AS RowAffected
FROM
(SELECT LOC_SID,
VERSION,
EFFECTIVE_DT_FROM,
EFFECTIVE_DT_TO,
CITY,
POSTAL_CD
FROM
(SELECT t.*,
LEAD(EFFECTIVE_DT_FROM, 1) OVER(PARTITION BY CITY, POSTAL_CD
ORDER BY EFFECTIVE_DT_FROM) AS next_date,
LEAD(VERSION, 1) OVER(PARTITION BY CTY, POSTAL_CD
ORDER BY EFFECTIVE_DT_FROM) AS next_version
FROM TEST t)
WHERE valid_to != next_date
OR VERSION = next_version)
Results
CITY POSTAL_CD COUNT(*)
chicago N/A 150
N/A N/A 400
existing data set
LOC_SID CITY POSTAL_CD EFFECTIVE_DT_FROM EFFECTIVE_DT_TO VERSION
81910 CHICAGO N/A 01.01.1900 31.12.2199 1
81911 CHICAGO N/A 01.01.1900 31.12.2199 1
81912 CHICAGO N/A 01.01.1900 31.12.2199 1
81913 CHICAGO N/A 01.01.1900 31.12.2199 1
81914 CHICAGO N/A 01.01.1900 31.12.2199 1
expected data set
LOC_SID CITY POSTAL_CD EFFECTIVE_DT_FROM EFFECTIVE_DT_TO VERSION
81910 CHICAGO N/A 01.01.1900 01.01.2017 1
81911 CHICAGO N/A 01.01.2017 02.01.2017 2
81912 CHICAGO N/A 02.01.2017 03.01.2017 3
81913 CHICAGO N/A 03.01.1900 04.01.2017 4
81914 CHICAGO N/A 04.01.2017 31.12.2199 5
after the fix and run the Data integrity check query i should get 0 rows
how do i make the EFFECTIVE_DT_FROM, EFFECTIVE_DT_TO and VERSION incremental if it would have been few records i would have manually adjusted and update it ,but i have many rows , how to fix this ?
i tried the below query ,but this will only update the only version ,but doesn't fix the issue
merge into TEST a
using
(
select LOC_SID,CITY,POSTAL_CD,EFFECTIVE_DT_FROM,EFFECTIVE_DT_TO,VERSION
,rank() over(partition by CITY,POSTAL_CD order by LOC_SID ) rnk
from TEST
where CITY='CHICAGO'
)b
on (a.LOC_SID = b.LOC_SID)
when matched then update set
a.VERSION=b.rnk;
I have noticed i have a scenario
LOC_SID CITY POSTAL_CD EFFECTIVE_DT_FROM EFFECTIVE_DT_TO VERSION
25101 ASSAM 1153 01.01.1900 31.12.2199 1
25102 ASSAM 1153 01.01.1900 31.12.2199 1
25103 ASSAM 1290 01.01.1900 31.12.2199 1
25104 ASSAM 1290 01.01.1900 31.12.2199 1
25105 ASSAM 1310 01.01.1900 31.12.2199 1
25106 ASSAM 1310 01.01.1900 31.12.2199 1
25107 ASSAM 1781 01.01.1900 31.12.2199 1
25108 ASSAM 1781 01.01.1900 31.12.2199 1
25109 ASSAM 1982 01.01.1900 31.12.2199 1
25110 ASSAM 1982 01.01.1900 31.12.2199 1
I have 31 cases like this ,when i tried your merge query it is not working , i have the below result set
LOC_SID CITY POSTAL_CD EFFECTIVE_DT_FROM EFFECTIVE_DT_TO VERSION
25101 ASSAM 1153 01.01.1900 01.01.2017 1
25102 ASSAM 1153 01.01.1900 31.12.2199 1
25103 ASSAM 1290 01.01.1900 01.01.2017 1
25104 ASSAM 1290 01.01.1900 31.12.2199 1
25105 ASSAM 1310 01.01.1900 01.01.2017 1
25106 ASSAM 1310 01.01.1900 31.12.2199 1
25107 ASSAM 1781 01.01.1900 01.01.2017 1
25108 ASSAM 1781 01.01.1900 31.12.2199 1
25109 ASSAM 1982 01.01.1900 01.01.2017 1
25110 ASSAM 1982 01.01.1900 31.12.2199 1
回答1:
I think that your logic using merge and row_number() is on the right track (although, presumably, the partition by clause is not needed, since you are filtering on the city` already). I extended it with additional logic to handle the dates:
the initial
effective_dt_fromand finaleffective_dt_toshould be left untouchedin between, you want to increment dates day by day starting on
'2017-01-01'.
Query:
merge into test t
using (
select
t.*,
row_number() over(order by loc_sid asc) rn,
count(*) over() cnt
from test t
where city = 'Chicago'
) t1
on (t1.loc_sid = t.loc_id)
when matched the update set
t.version = t1.rn,
t.effective_dt_from =
case
when rn = 1 then t.effective_dt_from
else date '2017-01-01' + rn - 2
end,
t.effective_dt_to =
case
when rn = cnt then t.effective_dt_to
else date '2017-01-01' + rn - 1
end
来源：https://stackoverflow.com/questions/61578278/auto-incremental-date-field-and-version-oracle-sql-for-a-table